True or false mammals use trees for both food and shelter.

This is true. An easy example is monkeys who eat food from trees, or hide there from other predators found on land that might attack them, or they live in the trees and sleep there, or hide from things like storms and bad weather. They are not the only ones and there are many mammals that do this.

Long term continuous groundwater monitoring, especially with warning systems and anthropic activity monitors

It would be 232.4242