What Best Describes Why the Upper Part of the Mantle

question 1

Multiple Choice

What best describes why the upper part of the mantle, called the asthenosphere, is important in plate tectonics?

• A) It is hot and plastic like, which allows the overlying plates to slide or move.
• B) It is the source of metallic minerals that form valuable ore deposits within the plates.
• C) It is the place where plates originate.
• D) It is the source of carbon that gets transformed into oil and gas within the plates.
• E) It is cold and dense, which keeps the oceans in the overlying plates relatively cool.

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Definitions:

Marginal Revenue

The additional income that a company generates from selling one more unit of a good or service.

Average Variable Cost

The per-unit variable cost of production, calculated by dividing total variable costs by the quantity of output produced.

Long-Run Scale

Refers to the time period in which all factors of production and costs are variable, allowing companies to adjust all inputs in response to market conditions.

Short-Run

A period in which at least one input is fixed, limiting the firm's capacity to adjust to changes in demand or market conditions.