Why are all consumers considered heterotrophic in an ecosystem?

• A. They convert sunlight into chemical energy.
• B. They decompose organic matter to obtain nutrients.
• C. They produce their own food through photosynthesis.
• D. They rely on consuming other organisms for energy.

Answer: (D)

Verified step by step guidance

1. Understand the term 'heterotrophic': In biology, heterotrophic organisms are those that cannot produce their own food and must obtain energy by consuming other organisms.
2. Identify the role of consumers in an ecosystem: Consumers are organisms that rely on other organisms for their energy and nutrient needs, as they cannot synthesize their own food.
3. Differentiate between autotrophic and heterotrophic organisms: Autotrophs, like plants, produce their own food through photosynthesis, while heterotrophs, including all consumers, must ingest other organisms.
4. Consider the options given: Evaluate each option to determine which accurately describes the energy acquisition method of consumers in an ecosystem.
5. Conclude why consumers are heterotrophic: Consumers are considered heterotrophic because they depend on consuming other organisms to obtain energy, rather than producing it themselves.