What type of organisms have the most biomass in a terrestrial food chain?

In terrestrial food chains, plants, specifically primary producers like grasses and trees, have the most biomass. They convert sunlight into energy through photosynthesis, forming the base of the food chain. Herbivores, which consume these plants, and carnivores, which feed on herbivores, have significantly less biomass compared to the primary producers above them. This pattern follows the ecological pyramid, where energy and biomass decrease at each trophic level.