instruction:
Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.
question:
Question: What allows giraffes to reach leaves that other ground animals cannot? Answer: long necks
answer:
African Giraffes. Giraffes feed on leaves high in trees. Their long necks allow them to reach leaves that other ground animals cannot.

question:
Question: When methane burns, what is produced along with carbon dioxide? Answer: water
answer:
Compounds can also react with oxygen, possibly creating oxides of more than one element. When methane burns, carbon dioxide and water are produced.

question:
Question: What kind of joints does the skull have that do not allow any movement? Answer: fixed joints
answer:
Image copyright Vasiliy Koval, 2013, modified by CK-12 Foundation. The skull has fixed joints that do not allow any movement . Used under license from Shutterstock. com.