How does studying mice help researchers understand the impact of junk food on an adolescent brain?

in a way it's dum but it also help them prodict future viruses like them could have predicted the Corona but they was to lazy to identify it.

It helps with understanding the brain

Explanation: In the 1800'-1950's, people didn't know how to safely perform experiments on humans, so they tested this theory on mice, and they've collected a LOT of information, so ever since then, they've been doing tests on mice, and some humans.

entrepreneur give a lot of money to people so the answer is a