I had to look for the options and here is my answer:
Endangered species include those animals that only exist in a very scarce number and therefore, should be taken care of and given much attention. A list if being monitored but the recover to this extent is still limited because of the hunting activities that still continue despite being listed as endangered.
Answer:
six elements-H C N O P Ca
B) Alkali metals, because all alkaline earth elements have an oxidation number of +2, making them very reactive
<span>This behavior is an example of B. overproduction. The frog lays thousands of eggs, which is much more than it needs, or would need in perfect conditions. However, most of those eggs doesn't survive, and little frogs are never born in that case. This is why it has to have a lot of eggs so as to ensure that a decent number of offspring survives so as to continue the species.</span>
