Refer to the Figure

question 7

Multiple Choice

Refer to the figure.
Considering the food web, imagine a circumstance where a new, mutually beneficial relationship develops between H₂ and H₃, increasing both of their numbers. The effects of this on P₂ and C₂ are best described as

• A) a direct negative effect on P₂ and a trophic facilitation effect on C_2.
• B) an indirect positive effect on P₂ and a direct negative effect on C₂.
• C) a trophic facilitation effect on both C₂ and P_2.
• D) a direct negative effect on both C₂ and P_2.

---

Definitions:

Different Speeds

Refers to varying rates of movement or progress.

Opponent-process Theory

A psychological and neurological model that accounts for a wide range of behaviors, including color vision and emotions, by assuming that stimuli trigger opposing processes in the brain.

Antagonistic Colors

Colors that are perceived to be opposite each other on the color wheel, such as red and green, and are believed to create visual contrast and harmony when used together.

Pure Tone

A pure tone is a sound with a steady sinusoidal waveform, characterized by a single frequency without any harmonics or overtones, often used in audiometry to test hearing.