What best describes the nucleus of a atom?

Explanation:

The nucleus of an atom is a small dense region at the center of an atom that contains protons and neutrons. Almost all the mass of an atom is located in the nucleus, with a very small contribution from the electron shells

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.