Which fossil can be found near the wishing well in the cave?

The fossil that can be found near the wishing well in Niagara Cave is a gastropod. Gastropods are a large and diverse class of mollusks that include snails and slugs, characterized by their distinct spiral shells and soft bodies. Their presence in a cave setting, particularly in limestone formations, is significant as it indicates a rich marine environment in the geological past when the area was underwater.

Gastropods are often formed from sedimentary deposits, and as caves are formed through the dissolution of limestone, fossils like gastropods can be preserved within these deposits. Observing such fossils can offer insights into the prehistoric ecosystems and the types of marine life that existed in that region millions of years ago.

In contrast, while horn corals, cephalopods, and trilobites are indeed fascinating fossils that can be discovered in various geological contexts, they are not specifically associated with the wishing well area in Niagara Cave. Each type has its distinct habitat and formation process, making gastropods the correct answer in this instance.