Seasonal variations in Earth's climate are caused by

The earth orbiting around the sun.

Explanation:

Before reading this explanation please bare in mind that the earth's axises are tilted and not in one straight line. Now as the earth orbits around the sun it is subjected to different angles each and everytime these different angles result in different amounts of sunlight striking the earth therefore the temepratures will differ changing the cimate and these changes are seasonal, we have four of them and they are known as our four seasons

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.

what are the awnser choices? i mean, without choices, it is an incompleat