Why should travel agents be aware of the weather/climate of a destination?

Which statements are true about point and nonpoint source pollution? human activity causes point and nonpoint source pollution. only nonpoint source pollution affects abiotic factors in a watershed. point source pollution affects only the part of the lake or river near it. both point and nonpoint source pollution affect biotic factors in a watershed. point pollution flows through the bodies of water in a watershed but not through its land.