Question

producers
are organisms which ____ or biomass through the process of ____

Explanation:

Producers in an ecosystem are organisms (like plants, algae, some bacteria) that produce food (organic matter) or biomass. The process by which they do this is photosynthesis (where they use sunlight, carbon dioxide, and water to make glucose and oxygen) or sometimes chemosynthesis (in deep - sea vents, using chemical energy). So the first blank should be "produce food" (or a similar term related to making organic matter) and the second blank is "photosynthesis" (or "chemosynthesis", but photosynthesis is more common for most producers like plants).

Answer:

First blank: produce food; Second blank: photosynthesis