How might aquatic mammals be effective in a natural environment if a cold or outer shell is compromised by population how my bird species be affected

the fossil record provides evidence of a common ancestor to many species.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds

i think the answer is 95 hope this

the answer is 95 degrees