What are an example of push factors and pull factors?

Characteristics of substance farming include all of the following except

What can happen to solar radiation when it enters earths atmosphere? check all that apply 1)it is absorbed by earth. 2)it is reflected by clouds. 3)it is reflected by glacial ice. 4)it is condensed into visible light. 5) is amplified by water molecules.

What first caused people to consider that the continents were once one large landmass?