Factors that influence the color change in fishes:

Correct option is A

Correct Answer: (a) Temperature
Explanation:
→ Temperature directly affects chromatophore activity, leading to darkening or lightening of fish color.
→ Rapid color change often results from physiological adjustments.
Information Booster:
→ Other major factors include light intensity, background color, and stress.
→ Hormones (e.g., MSH, melatonin) also play a major role, though not listed as correct here based on given key.