Question

multiple choice question
large numbers of small organisms move collectively to the oceans surface during the night and sink during the day. their movements can be detected by depth - recorders, and this layer of organisms is known as the ______ layer.
o reflection
o sonar ping
o deep scattering

Explanation:

Large numbers of small organisms that move to the ocean's surface at night and sink during the day form the deep - scattering layer. Their movements can be detected by depth recorders. The deep - scattering layer is a well - known phenomenon in oceanography related to the vertical migration of these organisms.

Answer:

C. deep scattering