What are van der waals forces?
a. a permanent dipole that causes hydrogen bonding in nonpolar
molecules
b. they are very strong forces that exist between two different
molecules.
c. they change polar molecules into nonpolar molecules
d. a temporary electron shift causing small dipole attractions
between molecules.

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence

answer: i dont know the answer but this might

explanation:

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they all get energy from eating other animals, dead animals to be more precise.

hienas tends to steal pray from other animals. crows and vultures tend to eat dead animals and leftovers.

hope it ,

bioteacher101