Final answer:
None of the given sentences use comparative adjectives to describe the same object. Comparative adjectives compare differences within the same object and typically come in pairs, which was not observed in the provided sentences.
Step-by-step explanation:
The question poses a task to identify which sentences among the given options use comparative adjectives to talk about the same object. A comparative adjective is used to compare differences between the two objects it modifies, which are usually qualified by adjectives such as 'tastier', 'bigger', 'smarter'. In this case, we are seeking sentences where the comparison is being made within the same object.
Let's evaluate the sentences:
Therefore, the sentences that use comparative adjectives are none from the given options since comparative adjectives were not used to describe the same object in a comparative degree within any single sentence.