Hi, I need some help with a quiz that I am taking. I have one attempt left and I've not been able to pass my quiz the other times, so I'm posting it here. I will post the quiz in 4 different parts since there are 20 questions and I think that you can't leave an entire quiz for people to look at. Here's part 1.

In the semi arid regions of China, the country's inhabitants have practiced water harvesting for generations. Water harvesting is the process of collecting rainfall and/or runoff for later use. How does this water conservation method help the environment?

Question 1 options:

A) Water harvesting causes drought-like conditions the rest of the year.

B) Harvesting water during the rainy season has damaged the ecosystem by killing some of the organisms.

C) By collecting run off during the rainy season for future irrigation increases the agricultural production.

D) Runoff is one of the main sources of drinking water so there is a shortage of drinking water the remaining part of the year.

Question 2
After a natural disaster such as a hurricane or tornado, what will happen in the damaged ecosystem?

Question 2 options:
A) Nothing; it will remain uninhabited.

B) A new, different ecosystem will evolve.

C) An ecosystem like the previous one will be re-established.

D) No one really knows what to expect after a natural disaster.

Question 3
The flooding in watersheds can be best prevented by.

Question 3 options:

A) fertilizer runoff

B) urban development

C) deforestation of vegetation

D) native plants with deep roots

Question 4
Wildfires have both negative and positive effects on an ecosystem. Which is a negative effect of wildfire on any ecosystem?

Question 4 options:

A) reduced animal habitats

B) increased plant diversity

C) germination of tree seeds

D) removal of thick underbrush

Question 5
Land features, such as Palo Duro Canyon in Texas, are shaped by the gradual wearing away due to

Question 5 options:

A) gravity.

B) faulting.

C) water erosion.

D) mountain building.