A Type of Fish That Is Relatively Low in Mercury

question 32

Multiple Choice

A type of fish that is relatively low in mercury is:

• A) shark.
• B) salmon.
• C) swordfish.
• D) king mackerel.

---

Definitions:

Headwaters

Headwaters are the source or uppermost reaches of a river or stream, often located in high elevation areas or mountainous regions.

Fast Flow

Refers to rapid movement of liquids, gases, or other substances, often observed in natural processes and engineered systems.

High Oxygen

Refers to environments or conditions where the concentration of oxygen is above the normal atmospheric level, influencing various biological processes.

Vegetation Layers

The different horizontal layers found within an ecosystem, each housing distinct plant and animal species adapted to their specific environment.