2. Some animals in the northern latitudes migrate south in order to survive. What abiotic factor causes the animals to annually leave their ecosystems?
(1 Point)
O heavy rains
O less oxygen
O cold weather
Please need help

How many atoms of oxygen are contained in 160 grams of n2o3

Which statement about the stamps is correct?

About 70 percent of the earth's surface is water-covered, and about 96.5 percent of all earth's water is salt water. identify the watery feature on earth that is made of freshwater rather than salt water. a) bay b) glacier c) ocean d) sea it is not incomplete this is the true question