Answer:
because harmful substances often chemicals or microorganisms contaminate a stream, river, lake, ocean, aquifer, or other body of water, degrading water quality and rendering it toxic to humans or the environment.
Explanation:
Hope This Helps!!!
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.
<span>The correct answer is D - Saturn. Astronomers have known about Saturn's rings since Galileo first spotted them through his telescope in 1610. We've learnt a lot more about them since then, though, for example, we now understand that they are build from billions of different ring particles.</span>
Answer:
The plan was that Serbia would expand its borders to include other territories with Serbian populations.
