Answer:
An element is a material that consists of a single type of atom. Each atom type contains the same number of protons. Chemical bonds link elements together to form more complex molecules called compounds. A compound consists of two or more types of elements held together by covalent or ionic bonds.
Explanation:
Above
^
I
I miss freshman science classgood stuff but the correct answer is permeability the definition of permeability is how easily a membrane allows a liquid to pass through
From my speculation it is loss of habitat and global warming
