In which of the following ecosystems is net primary productivity the

Correct answer: C) Swamps and marshes.
Net primary productivity refers to the amount of energy (in the form of organic compounds) that is produced by primary producers, such as plants, through photosynthesis, minus the amount of energy used by the producers for respiration.

Swamps and marshes, which are wetland ecosystems, generally have the highest net primary productivity compared to other terrestrial ecosystems for the following reasons:
Abundant water availability: Wetlands have a constant supply of water, which is a crucial resource for plant growth and photosynthesis.
Nutrient-rich soil: Wetland soils are often rich in organic matter and nutrients, providing an optimal environment for plant growth.
Warm temperatures: Many wetland ecosystems are located in warm climates, which further promotes high rates of photosynthesis and plant growth.

In contrast, temperate forests, savannas, and temperate grasslands generally have lower net primary productivity compared to swamps and marshes.