Choose a, b or c as the best answer. 23. Noise pollution in the oceans interferes with whales’:

Question

BlackTom AI · Accepted Answer

Whales rely heavily on acoustic signals: they produce low‑frequency calls and songs that travel long distances through water and are essential for social contact, mating, navigation and maintaining mother–calf bonds.

1) Relevant knowledge points and concepts
- Sound propagates much farther in water than in air, so many whale species depend on sound as their primary sense for long‑range communication.  
- Ocean noise sources (ship engines, seismic surveys, military sonar) raise ambient sound levels and can mask or distort whale vocalizations.  
- Masking occurs when a noise overlaps the frequency or timing of an animal’s signal, reducing the distance and clarity over which that signal is received.

2) Step‑by‑step reasoning
- Identify the functions whales use sound for: long‑range calls, social coordination, mating songs, mother–calf contact, and (for toothed whales) echolocation.  
- Recognize the pollutant: increased anthropogenic underwater noise elevates background levels across the same frequency bands whales use.  
- Apply masking concept: when background noise is higher, receivers cannot detect or distinguish calls, so communication range and effectiveness drop.  
- Conclude that the most direct and widely documented effect is impairment of whales’ communication systems.

3) Calculations
- No numerical calculations are required; the argument is based on qualitative acoustic principles (masking, signal‑to‑noise ratio).

4) Why the correct answer is correct
- Option (a) directly names “communication systems,” which are the primary and most consistently documented functions disrupted by ocean noise via masking and behavioral avoidance.

5) Why the other options are incorrect or less correct
- (b) Activities to find food: noise can affect foraging, especially for echolocating toothed whales, but this is species‑specific and secondary to broad communication impacts.  
- (c) Ability to cope with stress: chronic noise may increase stress, but this is an indirect physiological effect rather than the immediate, demonstrable interference described.

6) Conclusion
- Therefore the best answer is a. communication systems. This matches the provided correct answer.

Choose a, b or c as the best answer. 23. Noise pollution in the oceans interferes with whales’:Single choice

Similar Questions