They are lightning rods, and their purpose is to? A)protect the building in the event of thunder. B)protect the building in the event of a lightning strike. C)protect the building in the event of rain.

Option B

Explanation:

Whenever there is a lightning strike, the enormous amount of electrical energy generated is allowed to flow through a low resistant pathway i.e through the lightning rods to the ground so that the building and its resident remains intact and safe from the adverse impacts of lightning strike. These lightning rods are placed at a certain height above the top roof of the building  Hence, option B is correct

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.