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:
C
Explanation:
Extensive properties depend on the amount of substance. The volume of a sample is an extensive property: 1000 grams of water takes up more volume than 10 grams of water. Mass is also an extensive property.
Answer:
D) The outcome of congressional elections of 1866
Explanation:
The outcome of congressional elections of 1866 is the event that brought reconstruction to and end.
I believe it's a, it can't be B because it doesnt mention rain in the phrase given.
