The profusion of skin colors and physical characteristics of different humans is due to .

a. the development of pure races

b. the differences in climate and other living conditions humans encountered as they populated the globe

c. biology rather than evolution

d. the emergence of dominant groups in the last three centuries

D

Explanation:

The family trees and the punett square shows you.

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.

the answer is otpion c) understanding

he wants to be heard one more time. he wants to be understood. he needs the truth one more time.