instruction:
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:
Question: Ultimately, most life forms get their energy from this? Answer: sun
answer:
Ultimately, most life forms get their energy from the sun.


question:
Question: What is the lowest level of organism that can perform all activities required for life? Answer: cell
answer:
A(n) cell is the lowest level of organism that can perform all activities required for life.


question:
Question: What is the main reason for weather change? Answer: moving air masses
answer:

Moving air masses is the main reason for weather change.