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Which of the following ecosystems has highest rate of gross primary production?

1. Grasslands
2. Mangroves
3. Coral reefs
4. Equatorial rain forest

Correct answer: Equatorial rain forest

Solution

Equatorial rain forests have the highest gross primary production because they receive abundant sunlight, high rainfall, and warm temperatures throughout the year, allowing photosynthesis to occur continuously. Their dense, multilayered vegetation captures and converts more energy than the other listed ecosystems.

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