They use them as food and habitats.
Radioactive dating, depending on the certain amount of radioactive decay it leaves through the years you can predict the oldest one!
if that helped make sure to mark brainliest! <3
-procklown
"If blood temperature rises too high<span>, this is sensed by specialized neurons in the hypothalamus of the brain. ... As these blood vessels dilate, more blood flows close to the </span>body<span> surface and excess heat radiates from the </span>body<span>."</span>