The correct answer is Breath air. Reproduciton, homeostasis, and burrow digging, are not necessary for the survival of a single animal.
Hi there!
Magma is the same as lava, but just inside of the volcano before it is spewed out. (Lava is when it is spewed out.) They are basically the same thing (just different terms to describe it.)
Hope this helps!
Homeostasis or the source of body heat
