Question

how did galileo increase public support for copernicuss model?
by publishing his work in italian
by using data collected by tycho brahe
by explaining why planets appear to move backward
by arguing that earths rotation makes objects appear to move

Explanation:

Galileo published his works in Italian, the common - language of the people, rather than in Latin (the language of scholars). This made his support for Copernicus's heliocentric model accessible to a wider audience, thus increasing public support.

Answer:

A. by publishing his work in Italian