If possible I'd say all of them except the fourth one down (parts of ecosystems are independant) but if not I'd say the most valid one is the second one down (healthy ecosystems help animals)
Answer:
LBJ apparently stands for Lyndon B Johnson, an American president. THe only problem with him is that he was a racist I belive.
Explanation:
Answer:
Yes, you can
Explanation:
Prolonged or repeated exposure kills cells on your skin, which will damage it.
That is a poor convincer so your best bet is not doing that
Answer:
you will washed your hand
