What might be responsible for the observed difference in temperature between the coastal cities and the valley cities?

Altitude is responsible for the difference in temperature

Explanation:

Height from the sea level is responsible for the difference in temperature between the coastal cities and the valley cities. The temperature of the cities which are located on the coast having moderate temperature due to low altitude while the temperature of valley cites are low due to height from the sea level. So we can say that altitude is the main factor of changing temperature between the coastal cities and the valley cities.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

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