Which of the following causes slow environmental changes?

(a) tsunami
(b) landslides
(c) weathering and erosion
(d) forest fire

The answer is C: Weathering and Erosion

Explanation:

Erosion is mostly on the coasts, where the cliff are slowly worn away by the sea. This takes a long time, depending on the type of rock. Weathering also takes a while as it doesn't necessarily effect the environment directly.

Tsunamis, landslides and forest fires cause millions of dollars worth of damage in short periods of time, usually a day for the first two.

The answer to this question is B.

This is because erosion such as wind water etc, cause slow and more natural causes, vs a forest fire or land slides.