The answer is thunderstorm because using process of elimination, a thunderstorm is the only natural disaster that would produce lighting. By the way you put all the answers as a. Hope this helps!
<span>b. nitrogen is your answer :)</span>
Answer:
Humus improves soil fertility by acting as a reservoir for nutrients, increasing the water holding capacity of the soil, improving soil structure and friability, and providing a source of energy for living soil organisms.
