Which example is a biomass energy source? Question 5 options: wind corn petroleum water

What is one reason why so many corporations prefer to incorporate in the state of delaware?

Black death spread because of what problem in medieval europe? which one is it i need the answer quick . a- overcrowded cities b-too many farm animals c-not enough qualified doctors d-all of the above

The appalachian mountains rise to heights of about feet. 2,000 2,500 3,000 3,500