In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Question: How many protons and electrons each do carbon atoms have? Answer: six
Carbon atoms have six protons and electrons each.

Question: What develops in depressions where water flow is low or nonexistent? Answer: bogs
Bogs develops in depressions where water flow is low or nonexistent.

Question: What is caused by differences in density at the top and bottom of the ocean? Answer: deep currents

Deep currents are caused by differences in density at the top and bottom of the ocean.