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Which of the following indicates the correct sequence of the topography beneath the surface of the sea?

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Consider the following statements.

1. Most of the fishing grounds occur in areas where the continental shelf is wide.

2. Fishing is well developed in warm tropical waters.

3. Mixing of warm and cold currents facilitates plant nutrients for fish.

4. Inland fishing became significant in India.

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The oceanic ridge comes into existence due to

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Which of the following is not correctly matched?

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The amount of planktons to be found in the ocean is determined by

1. Depth of the water.

2. Ocean currents.

3. Temperature and Salinity.

4. Length of day and night.