Ijust need an advantage of wind energy and a disadvantage of hydroelectric energy.

In which of the following relationships is one organism always benefited while the other organism is always harmed

To be or not to be that is da question

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?