In this task, you are given a paragraph, and your task is to construct a question from the given passage. Construct question in such a way that (i) it is well explained in the paragraph, (ii) the words may/may not be present in the paragraph, (iii) it should start with what/how/describe. Avoid creating a question that (i) is just relevant to one or two sentences, and (ii) not relevant to passage.
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Question: The growing season starts. Bark grows on a tree. The inside of the tree grows. The bark is pushed out around the tree trunk. The bark leaves a ring. The growing season slows down and ends.

Answer: How do rings form inside the trunk of a tree?

Question: Get some pumpkin seeds. Plant the pumpkin seeds in soil. Water the plant if it starts to dry out. Don't water directly on the leaves. Male flowers appear. Female flowers are open for one day. Pumpkins mature 85-125 days after planting.

Answer: What are the steps involved in growing a pumpkin?

Question: Grass and small plants grow in an area. These plants die. The soil gains organic material. The soil becomes more fertile. Larger plants are able to be supported. Trees eventually grow.

Answer:
How do forests form?