In relation to their position in a food chain, plants and photosynthetic algae have in common that they are both producers. This means that they are capable of producing their own food through the process of photosynthesis.
Here's why:
1. Plants and photosynthetic algae are able to convert sunlight, water, and carbon dioxide into energy-rich molecules like glucose through photosynthesis.
2. As producers, they form the base of the food chain by providing this energy to other organisms such as herbivores (first-level consumers) that feed on them.
3. In contrast, top-level consumers are organisms at the highest trophic level that feed on other consumers rather than producers.
Therefore, the correct statement is: They are both producers.
