What are the characteristics of a strong current in a dive?

A strong current in a dive is often marked by increased effort required to swim against the flow, which can lead to physical fatigue. Divers may also experience disorientation because strong currents can change the orientation of the diver and may cause them to lose track of their original location. Furthermore, variations in depth are common as currents can create upwellings or downwellings, altering the environment and making it challenging to maintain a steady position.

This option accurately captures the real physical dynamics at play when diving in strong currents, highlighting the challenges divers face in such conditions. In contrast, other choices do not accurately reflect the realities of diving in strong currents; for instance, increased visibility is often not associated with strong currents, and the assertion that all marine life is pushed to the surface or that there is less oxygen present in the water does not represent the typical effects of current strength on a diving environment.