The 4th one. Maintaining body temperature and cooling down
Biological diversity is the variety of species in a given area. If a new species is added there are more species and therefor greater biological diversity and if one goes extinct there are less species and therefore less biological diversity.
The latter are throat<span> teeth. Most predacious fishes swallow their prey whole, and the teeth are used for grasping and holding prey, for orienting prey to be swallowed (head first) and for working the prey toward the esophagus. There are a variety of tooth types in fishes.</span>
<span>The main significance of the fossils Darwin found
was that they inspired/reenforced his theory of evolution by showing
that the bone structures of species have changed over time. </span>
They’re population will decrease and potentially go extinct
