How have astronomers formed their ideas about the layers of the sun?(1 point)

Question

Responses

developing mathematical models based only on known data
developing mathematical models based only on known data

making direct observations of the sun's layers
making direct observations of the sun's layers

using theoretical models combined with known data
using theoretical models combined with known data

observing all the layers during total solar eclipses

Answer 1

observing all the layers during total solar eclipses