Which of the following causes slow environmental changes?

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

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.

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.

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the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).