Mechanical weathering is the physical breakdown of rock into smaller pieces. Mechanical weathering breaks rocks down into smaller pieces. This gives the rock a larger surface area for chemical reactions to take place. Chemical weathering is the breakdown of rock by chemical processes.
D. This is a contemporary issue due to global warming, etc
Answer:
Fish
Explanation:
Fish are vertebrates and only have a single loop-circulation system.
Answer:
c
Explanation:
Natrual selection is survival of the fittest, so only the best suited for that environment survive.
