Which of These Properly Illustrates the Principle of Isostasy

question 4

Multiple Choice

Which of these properly illustrates the principle of isostasy?

• A) High-density crust floats on top of low-density mantle.
• B) Mountains stand high because they are gravitationally balanced by their deep crustal roots.
• C) When weight is added to the crust,the crust responds by rebounding upward.
• D) When material is removed from the crust,the crust maintains the new,lower elevation.

---

Definitions:

Disposable Income

The amount of income left for an individual or household after paying all taxes, available for spending, saving, or investing.

Autonomous Consumption

The level of consumption that occurs when income is zero, showing the basic level of consumption necessary for survival.

Permanent Income Hypothesis

A theory suggesting that people's consumption decisions are based on their long-term income expectations rather than their current disposable income.

Negative Savings

A situation where spending exceeds income, resulting in a deficit rather than savings.