Some Aleutian Islands Are Surrounded by Urchin Barrens While Others

question 18

Multiple Choice

Some Aleutian Islands are surrounded by urchin barrens while others are surrounded by kelp forests. Which statement gives the primary explanation for these differences?

• A) Kelp forest islands and urchin barren islands differ with respect to oceanic currents.
• B) Kelp eat urchins, thus preventing their establishment.
• C) The kelp forest islands experience a substantially warmer climate than do the urchin barren islands.
• D) Grazing by urchins prevents the formation of kelp forests.

Understand the impact of fiscal policy and automatic stabilizers on the economy.

Distinguish between recessionary and inflationary gaps and their implications.

Comprehend the role and effects of government spending and taxation in fiscal policy.

Recognize the historical context and evolution of fiscal policy and national debt.

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Definitions:

Compulsions

Repetitive behaviors or mental acts that an individual feels driven to perform in response to an obsession, or according to rules that must be applied rigidly.

Repetitive Behaviors

Actions performed over and over again, which can be a characteristic of certain psychological conditions, such as OCD.

Obsessive Thoughts

Intrusive, unwanted thoughts that often cause distress or anxiety and may lead to compulsive behaviors in an attempt to alleviate the distress.

Obsessive-Compulsive Disorder (OCD)

A mental disorder where individuals experience repetitive, unwanted thoughts (obsessions) and behaviors (compulsions) they feel compelled to perform.