Short Answer 
The assertion that parenchyma cells assist in food storage is true due to their large vacuoles, while the reason provided, that they are primary sites for photosynthesis, is also accurate but does not explain the assertion. Therefore, both statements are true, but the reason is not correctly linked to the assertion, leading to the conclusion to choose option b.
Step 1: Understand the Assertion
The first part of the statement is the assertion, which claims that parenchyma cells assist in the storage of food. This is accurate because these cells have large central vacuoles that allow them to store various substances, including nutrients and food products. In essence, the main role of parenchyma cells is to facilitate food storage in plants, making this assertion true.
Step 2: Analyze the Reason
The second part is the reason provided, stating that parenchyma cells are the primary sites for photosynthesis. While this is also true‚ÄöAiparenchyma cells do contain chloroplasts which are involved in photosynthesis‚ÄöAiit does not directly explain or relate to the assertion about food storage. Photosynthesis is the process of converting sunlight into energy, separate from the function of storing food.
Step 3: Determine the Relationship
Finally, we must assess the relationship between the two statements. Both the assertion and reason are indeed true, but the reason does not satisfactorily explain why parenchyma cells help in food storage. Thus, we conclude that the correct response is that both statements are true, but the reason is not correctly linked to the assertion. This leads us to select option b) as the correct answer.