Question

what is the main function of the cell wall in a plant cell?
to make proteins

to break down sugar and release energy that the cell can use

to give strength and stiffness to the cell

to use energy from sunlight to make sugar

Explanation:

• "to make proteins" is the function of ribosomes.
• "to break down sugar and release energy that the cell can use" is the function of mitochondria (cellular respiration).
• "to give strength and stiffness to the cell" matches the cell wall's role in plant cells (providing structural support).
• "to use energy from sunlight to make sugar" is the function of chloroplasts (photosynthesis).

Answer:

to give strength and stiffness to the cell