Beaver trades
Look closely at the beaver footprints. The back paws show us that the beaver is adapted for life anywhere in the state, as long as it is
habitat

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

you know they are heterozygous for a trait because they have it as jj or jj.

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers