Numerical answer
The four sentences below, labelled 1-4, can be arranged in a logical order to form a coherent paragraph. Enter the correct order as a four-digit number (e.g., 2413).
1. This rise in ambient noise can mask the acoustic signals these animals depend on, forcing some species to call louder, shift frequencies, or abandon otherwise suitable habitats altogether.
2. Marine mammals such as whales and dolphins rely on echolocation and low-frequency calls to navigate, find food, and communicate across vast oceanic distances.
3. Conservationists now argue that regulating underwater noise deserves the same policy attention as more visible threats like overfishing or plastic pollution.
4. Ship traffic, sonar systems, and offshore construction have dramatically raised background noise levels in many ocean regions over the past century.
1. This rise in ambient noise can mask the acoustic signals these animals depend on, forcing some species to call louder, shift frequencies, or abandon otherwise suitable habitats altogether.
2. Marine mammals such as whales and dolphins rely on echolocation and low-frequency calls to navigate, find food, and communicate across vast oceanic distances.
3. Conservationists now argue that regulating underwater noise deserves the same policy attention as more visible threats like overfishing or plastic pollution.
4. Ship traffic, sonar systems, and offshore construction have dramatically raised background noise levels in many ocean regions over the past century.
Show answer and solution
Answer: 2413
Sentence 2 introduces marine mammals' reliance on sound. Sentence 4 then introduces the rising ocean noise problem. Sentence 1 explains the direct consequence of this noise ('This rise... can mask...'), and sentence 3 closes with the resulting policy argument. The order is therefore 2-4-1-3.
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