<span>B. es
</span>
We use "es" to refer where someone is from.
Well, to answer your first question, Because there are places on Earth that are both biologically rich — and deeply threatened. For our own sake, we must work to protect them. and for your 2nd question, 3 characteristics of magnetic reversal are: field, bar magnet, and molten material. Hope this helps
Answer:
I am not sure but I think the answer is of first one.
