Based on the options provided, it's challenging to determine the correct response without additional context regarding the specific materials used in the student's simulation. However, if we consider common representations in simulations, one possible answer could be:
The tongs and the plastic cup.
This response implies that the tongs could represent the gorilla (as they can grasp and hold objects) and the plastic cup could represent the sloth (perhaps due to its stationary nature). However, it is important to refer directly to the materials list from the lab report for the most accurate answer.