In a terrestrial ecosystem, who are the primary producers?

The correct answer is Option (2) – Herbaceous and woody plants

Primary producers are organisms that produce their own food through the process of photosynthesis, converting solar energy into chemical energy. In terrestrial ecosystems, the main primary producers are herbaceous (non-woody) plants and woody plants (trees and shrubs). These plants capture sunlight and use it to convert carbon dioxide and water into glucose and oxygen, forming the base of the food chain and supporting all other trophic levels in the ecosystem.

In contrast, the other options are not primary producers in a terrestrial ecosystem:

• Insects and birds are consumers, not producers. They rely on plants and other animals for their energy.
• Phytoplankton and algae are primary producers, but they are typically found in aquatic ecosystems, not terrestrial ones.