Which organism component is likely to contain chloroplasts?

Chloroplasts are specialized organelles found in the cells of plants and some algae, responsible for photosynthesis—the process by which light energy is converted into chemical energy in the form of glucose. An autotroph is an organism that can produce its own food using light or chemical energy. This means that autotrophs, which include plants and some types of bacteria and protists, must have the necessary structures, such as chloroplasts, to carry out photosynthesis effectively.

In contrast, heterotrophs are organisms that cannot synthesize their own food and rely on consuming other organisms for energy. Herbivores and primary consumers are categories of heterotrophs; herbivores specifically consume plants and primary consumers refer to organisms that eat producers (plants or autotrophs). While herbivores do interact with autotrophs—which contain chloroplasts—they do not have chloroplasts themselves since they do not perform photosynthesis.

Therefore, the presence of chloroplasts is exclusively associated with autotrophs, making it the correct choice in the context of this question.