The correct answer is A. Herbivorous.
A food chain is a linear sequence of organisms through which nutrients and energy pass. At the bottom of the food chain are the producers, which are organisms that can make their own food using sunlight. The next level up are the consumers, which are organisms that cannot make their own food and must eat other organisms to survive. Consumers can be herbivores, carnivores, or omnivores. Herbivores eat plants, carnivores eat animals, and omnivores eat both plants and animals.
In a grassland ecosystem, the top consumers are herbivores. This is because the grasslands are dominated by plants, which are the primary producers in this ecosystem. The herbivores in a grassland ecosystem include grazing animals such as cows, sheep, and deer. These animals eat the plants and convert them into energy that they can use to survive.
The carnivores in a grassland ecosystem are the animals that eat the herbivores. These animals include predators such as wolves, coyotes, and foxes. The carnivores in a grassland ecosystem are an important part of the food chain because they help to control the population of herbivores.
The bacteria in a grassland ecosystem are decomposers. This means that they break down the dead organisms in the ecosystem and release nutrients back into the soil. The bacteria in a grassland ecosystem are an important part of the food chain because they help to recycle nutrients.
Therefore, the top consumers in a grassland ecosystem are herbivores.