Water pollution from pulp and paper mills harms plants, animals, and humans. this is an example of

Point source pollution

Explanation:

All industries and farms which release pollution at their own place comes under the category of point source pollution.

A point source pollution is basically immobile and is released by a single source. While a non point source of pollution diffuses from different directions such as storm water run off drainage, Land runoff , precipitation etc.

Thus, water pollution from pulp and paper mills harms plants, animals, and humans. this is an example of point source pollution

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1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.