Some Birds Follow Moving Swarms of Army Ants in the Tropics

question 37

Multiple Choice

Some birds follow moving swarms of army ants in the tropics. As the ants march along the forest floor hunting insects and small vertebrates, birds follow and pick off any insects or small vertebrates that fly or jump out of the way of the ants. What is the specific benefit relationship?

• A) Birds benefit from the association and harm the ants.
• B) Birds and ants benefit from the association.
• C) Birds do not benefit from the association, but the ants do.
• D) Birds benefit from the association, but have no impact on the ants.
• E) Neither birds nor ants benefit from the association.

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Definitions:

Interest Payments

The amount paid by a borrower to a lender as compensation for the use of borrowed money.

Debt

Debt refers to money borrowed by one party from another, under the condition that it is to be repaid, usually with interest.

Externality

An economic term referring to a cost or benefit incurred or received by a third party who has no control over how that cost or benefit was created.

Capital Budgeting

The process of evaluating and selecting long-term investments that are in line with a company's goal of maximizing shareholder value.