Which detail from "eyes on the skies" is the most convincing evidence that incas used machu picchu as an observatory?

a. the description of how the royals needed a retreat
b. the description of how the temple of the sun can be used
c. the description of what winter is like in peru
d. the description of the inca's religious customs

The correct answer is letter B.

Explanation: The Incas observed the Sun, and it is showed in the Eyes on the Skies so this is the prove of what they did there.

B. the description of how the Temple of the Sun can be used.

Explanation:

The detail provided in "Eyes on the Skies" that best supports the idea that the Incas used Machu Picchu as an observatory is the description of how the Temple of the Sun can be used. The Temple of the Sun is part of the archaeological complex in Machu Picchu. It was used to offer tributes, present offerings to the sun and as a place from which to measure the stars and solstices.

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