I'm pretty sure the answer is D but it's been a while since I've studied this. 95% sure it's D though :)
Characters, A backround story
Answer:
Climate change is a very bad problem caused by us humans. Our carbon footprint has caused polar ice caps to melt, sea level to rise, and weather to get hotter. Climate change is mostly caused by big factories that emit chemical smoke into the atmosphere. This change change is also caused by the carbon dioxide that is produced by cars. One way people could reduce climate change is by using electric cars or by taking the bus more often.
Explanation: Hope that helps :)
The three transposing agents of erosion are water, wind and deforestation.
Answer: A)is greater near the source than near the mouth
Explanation: A stream is a small river; a large creek; a body of moving water confined by banks.
Gradient is an area of ground that tends evenly upward or downward.
A stream gradient can be defined as an area of water that that tends evenly upward or downward of the stream and it is measured by the difference in elevation between two points on a stream divided by the distance between the two points that the water actually flows.
The gradient influences the speed in respect to time of the stream. The steeper the gradient, the higher will be the speed of the of the flow.