Answer:
b is the correct answer i guess
Answer:
much in common!
Explanation:
Birds, crocodiles and dinosaurs have much in common – including, it turns out, their breath. The hyper-efficient breathing system of birds is shared with alligators, and probably evolved in archosaurs, the common ancestor of crocodilians, birds and dinosaurs.
The lowest level of environmental complexity that includes living and nonliving factors is the
C: Ecosystem
The number of protons and elctrons adds up to the mass number