Final answer:
Sponges obtain food by filtering water through their bodies to capture small particles. The amount of water required to obtain an ounce of food would vary depending on the efficiency of the sponge's filtering system.
Step-by-step explanation:
The amount of water a sponge must move in order to get an ounce of food depends on various factors such as the type and size of the sponge and the type of food it consumes. However, sponges generally obtain their food by filtering water through their bodies to capture small particles, such as plankton or organic matter. The water flow creates a feeding current, and sponges extract nutrients from the water as it passes through their bodies. The amount of water required to obtain an ounce of food would vary depending on the efficiency of the sponge's filtering system.
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