Meaning: 'Meagre' means lacking in quantity or quality; in this context, it refers to the faintness of the starlight.

Wrong options:

• meanders: 'Meanders' refers to winding or curving paths, which does not relate to the description of starlight and is grammatically incorrect in this context.
• meadows: 'Meadows' are fields of grass, which is unrelated to the concept of starlight and does not fit the grammatical structure.
• marmalade: 'Marmalade' is a type of fruit preserve, which is completely irrelevant to the context of starlight and does not fit grammatically.

Correct answer: beam

Explanation: The word 'beam' is appropriate as it refers to a concentrated stream of light, which aligns perfectly with the context of capturing light through a telescope. It fits grammatically and contextually, as it describes the type of light being manipulated.

Meaning: 'Beam' means a ray or shaft of light, indicating the focused light that the telescope captures.

Wrong options:

• bouquet: 'Bouquet' typically refers to a collection of flowers, which does not relate to light and is grammatically incorrect in this context.
• buckles: 'Buckles' are fasteners or bends, which do not apply to the concept of light and do not fit the grammatical structure.
• bender: 'Bender' refers to something that bends or a person who bends things, which is irrelevant to the context of light and does not fit grammatically.

Correct answer: refraction

Explanation: The term 'refraction' is the correct choice as it describes the bending of light when it passes through different mediums, which is the principle being discussed in the context of telescopes. It fits both grammatically and contextually.

Meaning: 'Refraction' refers to the change in direction of light as it passes through different materials, crucial for how telescopes function.

Wrong options:

• register: 'Register' refers to recording or a range of language, which does not relate to the bending of light and is grammatically incorrect in this context.
• remarkable: 'Remarkable' means worthy of attention, which does not fit the context of light manipulation and is grammatically incorrect.
• revile: 'Revile' means to criticize in an abusive manner, which is unrelated to the scientific principle being discussed and does not fit grammatically.

Correct answer: combination

Explanation: The word 'combination' is suitable as it refers to the pairing of two types of glass used in telescopes to enhance image quality. It fits grammatically and contextually, as it describes the method used to achieve clarity.

Meaning: 'Combination' means the act of joining two or more elements together, in this case, types of glass to improve telescope performance.

Wrong options:

• coloration: 'Coloration' refers to the color or tint of something, which does not apply to the context of lens construction and is grammatically incorrect.
• cyclic: 'Cyclic' means occurring in cycles, which is irrelevant to the context of lens design and does not fit grammatically.
• chimes: 'Chimes' refer to musical sounds, which is unrelated to the topic of telescopes and does not fit grammatically.

Correct answer: whispers

Explanation: The word 'whispers' is fitting as it metaphorically describes the faint signals of the universe, aligning with the poetic tone of the passage. It fits grammatically and contextually, emphasizing the subtlety of celestial messages.

Meaning: 'Whispers' refers to soft, quiet sounds, used here to evoke the idea of faint signals from the cosmos.

Wrong options:

• winnow: 'Winnow' means to separate or distinguish, which does not fit the context of light or sound and is grammatically incorrect.
• warrant: 'Warrant' means to justify or guarantee, which is unrelated to the concept of faint signals and does not fit grammatically.
• welfare: 'Welfare' refers to health, happiness, or fortunes of a person or group, which is irrelevant to the context of starlight and does not fit grammatically.