Describe how a large brain might help a mammal survive.

Mammals with big brains tend to be less abundant in local areas than those with smaller brains, new research.

Body size and diet are known to influence mammal abundance in different areas, but brain size had not been considered previously. This new study shows that larger brains correlate with lower population densities, likely because of the additional resources they require.

probably 3 since archeologists and historians don’t understand there writing.