The answer is B. photic zone
Explanation:
There are four main types of deltas classified by the processes that control the build-up of silt: wave-dominated, tide-dominated, Gilbert deltas, and estuarine deltas.
Answer:
relating to or supporting democracy or its principles.
This is your answer of your question.
Answer: A- It is a high tide somewhere on Earth constantly
Explanation:
Because the Earth rotates through two tidal “bulges” every lunar day, coastal areas experience two high and two low tides every 24 hours and 50 minutes. High tides occur 12 hours and 25 minutes apart. It takes six hours and 12.5 minutes for the water at the shore to go from high to low, or from low to high.
So, the question is asking: why has (over the course of human history) rural settlement declined (and it is suggested that this is connected to humans moving away from the rural areas, to urban areas, rather than human population declining in general:
this process is called urbanization and its major cause is that on the one hand, food in the industrialized societies can be produced more effectively so there is less work on farm, and on the other hand the service sector has increased, which means that there is more work in the cities.
