Animal migration on savannas is often governed by distance
reproduction
rainfall
fire

The answer would be rainfall.

Explanation:

The reason why this is the answer is because rain is essential for survival in such a hot and dry climate. Droughts are quite frequent in the savanna and the lack of water leads to the death of many organisms.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.