Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Glaciers deposit their sediment when they melt.

Answer: When do glaciers deposit their sediment?


Question: Constructive forces type of forces are involved when deposited rock forms deltas or barrier islands.

Answer: What type of forces are involved when deposited rock forms deltas or barrier islands?


Question: The long, threadlike extensions of the nerve cell help transmit nerve impulses.

Answer:
Which part of the nerve cell helps transmit nerve impulses?