The vertical sequence of the layers of soil is called a soil
a. dynasty.
b. horizon.
c. profile.
d. family.

The correct answer is C - profile.

A soil profile is the vertical section of the soil from the ground surface downwards to where the soil meets the underlying rock. The soil profile can be as little as 10cm thick in immature soils and as deep as several meters in tropical areas where the climate is conducive to rapid alteration of the underlying rock to form soil.

In temperate areas, the soil profile is often found a meter deep and in arid areas it is generally shallower than this. 

other sources of text

explanation:

this can be magazines, news reports, scholarly articles, textbooks, research papers etc.

affirmative action refers to the policies that take gender, race, or ethnicity into account in order to promote equal opportunity.

employers subject to title vii are prohibited from taking race or sex into account in any employment decisions. aa is a penalty for having any job group substantially statistically "underutilized" in any race or either sex. the employer must take steps to eliminate the underutilization, then stop, ending its aa efforts