Answer:
Mountains and bodies of water
Explanation:
Mountains and bodies of water protected empires as it was the mountains that served as a barrier that protected ancient China and was used as an invasion route by the Aryans into ancient India also water bodies provided agricultural facilities which helped in allowing the empires become more successful.
Answer:
B. Three rings cleaved bark
Explanation:
xylem is arranged in rings. The xylem vascular tissue has water and minerals that is from the roots that go to.the rest of the tree. It also gives the tree physical support. Its found inside the cambium layer.
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