It is important to develop alternative
sources of energy because oil-

I don't know about the oil part but "It is important to develop alternative

sources of energy because scientists are unsure of how long they will last"

Explanation:

Because they are nonrenewable resources, it takes hundreds to millions of years for them to be made again naturally. Once we're out, we're out. It would be a huge issue of that happened because Oil, Petroleum, and Natural Gas (all fossil fuels) are needed for heating, gas stoves, etc.

its going to be mutualism cuz they both benefit from the relationship.

~batmans wife dun dun