A.I. Explanation:

Correct answer: stellar

Explanation: The word 'stellar' is an adjective that describes something related to stars. In this context, it fits grammatically as it modifies 'systems,' indicating that these systems are star-related, which aligns with the overall topic of galaxies.

Meaning: 'Stellar' refers to anything pertaining to stars.

Wrong options:

• solar: The term 'solar' specifically relates to the sun, which does not encompass all stars and therefore does not fit the context of describing galaxies.
• largest: 'Largest' is an adjective that describes size, but it does not relate to the nature of the systems being star-related.
• stretches: 'Stretches' is a verb that does not fit grammatically as it cannot modify 'systems.'
• sketches: 'Sketches' is a verb that implies drawing or outlining, which does not fit the context of describing a type of system.
• located: 'Located' is a past participle that describes position, which does not fit as a descriptor for the type of systems in question.

Correct answer: largest

Explanation: The word 'largest' is the superlative form of 'large,' which is appropriate here as it compares the Milky Way System to other systems in the Local Group, indicating it is one of the biggest. This fits both grammatically and contextually.

Meaning: 'Largest' means the biggest in size or extent.

Wrong options:

• stellar: 'Stellar' describes something related to stars, which does not fit in the context of comparing sizes of systems.
• solar: 'Solar' refers specifically to the sun, which is not relevant when discussing the size of galaxies.
• sketches: 'Sketches' is a verb that does not fit grammatically as it cannot describe the size of systems.
• located: 'Located' is a past participle that describes position, which does not relate to size comparison.
• stretches: 'Stretches' is a verb that implies extension, which does not fit the context of describing size.

Correct answer: sketches

Explanation: The term 'sketches' is used here as a verb that indicates the measurement or extent of the Andromeda galaxy. It fits grammatically as it describes the action of measuring the distance across the galaxy, which is relevant to the context.

Meaning: 'Sketches' means to outline or measure, in this case referring to the distance across the galaxy.

Wrong options:

• largest: 'Largest' is an adjective that describes size, which does not fit as it does not indicate an action or measurement.
• located: 'Located' is a past participle that describes position, which does not fit in the context of measuring distance.
• solar: 'Solar' refers specifically to the sun, which does not relate to the measurement of the Andromeda galaxy.
• stretches: 'Stretches' is a verb that implies extension but does not convey the action of measuring distance as effectively as 'sketches.'
• stellar: 'Stellar' describes something related to stars, which does not fit the context of measuring the galaxy.

Correct answer: located

Explanation: The word 'located' is a past participle that describes the position of the Andromeda galaxy in relation to us. It fits grammatically as it indicates where the galaxy is situated, which is relevant to the context of distance.

Meaning: 'Located' means to be situated or positioned in a specific place.

Wrong options:

• largest: 'Largest' is an adjective that describes size, which does not fit as it does not indicate position.
• sketches: 'Sketches' is a verb that does not relate to the position of the galaxy and does not fit grammatically.
• solar: 'Solar' refers specifically to the sun, which does not apply to the context of the Andromeda galaxy's position.
• stretches: 'Stretches' is a verb that implies extension, which does not fit in the context of describing the location of the galaxy.
• stellar: 'Stellar' describes something related to stars, which does not fit the context of indicating a specific location.