Answer:
there are 7 breeding pairs
Explanation:
<span>prorostomes and deuterostomes is your answer</span>
3 examples are-
1.ice wedging - when water gets into cracks, freezes and expands
2.roots-while they grow, they push rocks aside that later break.
3.animals- when they dig underground, they push rocks aside causing them to break
The answer would be evolution, the creature must evolve and adapt to survive.