Why is the federal income tax a progressive tax?
a. a higher income has more deductions.
b. a higher income pays a lower rate.
c. corporations can lower their taxable income.
d. a higher income pays a higher percentage in taxes.

A progressive tax means that the richer people will pay a higher percentage of their income in taxes. This prevents extreme wealth accumulation and helps poor people survive- they don't have to pay as much taxes and hence can better afford food and shelter. 

The correct answer is:
D. A higher income pays a higher percentage in taxes.

Monetary that’s he answer

The one that most represents the earths mantle would be the skin since the mantle is the upper part of the earths depths which is just like the skin of an apple.