Final answer:
None of the options.
An essential piece of information is missing to determine the time for which Amy can rent snorkeling gear; without it, we cannot select a correct option.
Step-by-step explanation:
The student's question seems to be missing the information required to fill in the blank regarding the time for which Amy can rent snorkeling gear.
To provide an accurate answer, we would need the rates or options available for renting the gear.
In this situation, we would typically look at a chart or a list of rental times and prices to determine which would be the best option for Amy based on the duration she plans on going snorkelling.
Without additional information, it's not possible to select one of the options provided (1 hour, 2 hours, half a day, or a full day) as the correct option in the final answer.