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: Where are some of the greatest concentrations of species found? Answer: in the tropics
answer:
Some of the greatest concentrations of species are found in the tropics.

question:
Question: Skeletal muscles must work in pairs to move bones back and forth at a joint because they can only do what? Answer: contract
answer:
Skeletal muscles must work in pairs to move bones back and forth at a joint because they can only contract.

question:
Question: What is the region called where an electron is most likely to be found? Answer: the orbital
answer:
The orbital is the region called where an electron is most likely to be found.