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.

[Q]: Question: What is the critical factor for the survival of segmented worms? Answer: water and humidity
[A]: Water and humidity is the critical factor for the survival of segmented worms.

[Q]: Question: Which gas is given off by plants? Answer: Oxygen
[A]: Oxygen gas is given off by plants.

[Q]: Question: What is the upward force exerted by fluids when any object, such as a boat, is placed in it? Answer: bouyant force
[A]:
Bouyant force is the upward force exerted by fluids when any object, such as a boat, is placed in it.