Kevin Is Studying Predator-Prey Interactions

question 44

Multiple Choice

Kevin is studying predator-prey interactions. One day he notices a spider eating a cricket caught in its web. Later that day, a bird eats the spider. How many populations are involved in his study?

• A) 0
• B) 1
• C) 2
• D) 3
• E) 4

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Definitions:

Aggregate Demand

The total demand for all goods and services in an economy at different price levels, during a specific time period.

Government Purchases

Expenditures by government entities on goods and services that are directly consumed or invested to achieve public objectives, contributing to aggregate demand.

Crowding-out

A phenomenon where increased government spending leads to a reduction in private sector spending and investment due to higher interest rates.

Aggregate Demand

The complete market appetite for all goods and services in an economy, assessed at a defined price level during a particular duration.