Their sure the only sounds they will hear at night will be the wash of ocean waves or the croaks of bullfrogs.

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What corrections should be made to this sentence?

To determine what sounds someone will hear at night, we need to consider the location and surroundings. In this case, the person is expecting to hear the wash of ocean waves or the croaks of bullfrogs. Here's how we can explain why they might expect these sounds:

1. Location: If the person is in a coastal area near the ocean, it's likely they will hear the wash of ocean waves at night. The proximity to the ocean means that the sound of the waves breaking on the shore can carry inland and be audible during the night, especially if there are no other major sources of noise nearby.

2. Surroundings: Bullfrogs are known for their distinctive croaking sound, which is usually more prevalent near bodies of water such as lakes, ponds, or marshes. These amphibians are most active at night, and their croaking is a typical sound associated with wetland environments.

Therefore, if the person is located in a coastal area near the ocean and there are bodies of water nearby that support a bullfrog population, it is likely that they will hear the wash of ocean waves and the croaks of bullfrogs at night.