What is the primary process through which carbon is incorporated into life-forms?CombustionRespirationPhotosynthesisDecomposition

To determine the primary process through which carbon is incorporated into life-forms, we first need to understand the options provided:

1. Combustion: This process involves burning organic material, which releases carbon into the atmosphere rather than incorporating it into life-forms.

2. Respiration: In this process, organisms consume organic matter (which contains carbon) to produce energy, releasing carbon dioxide back into the atmosphere.

3. Photosynthesis: This is the process by which plants, algae, and some bacteria convert carbon dioxide from the atmosphere into organic compounds, specifically sugars, using sunlight as energy. This process effectively incorporates carbon into life-forms.

4. Decomposition: This process involves the breakdown of dead organic material by decomposers, returning carbon to the environment rather than incorporating it into new life-forms.

The primary process through which carbon is incorporated into life-forms is Photosynthesis. During photosynthesis, plants take in carbon dioxide and, utilizing sunlight, convert it into glucose, which serves as a vital energy source for themselves and other organisms in the food chain.