Which of the following describes a relationship of parasitism?

A. Oxpecker birds eat parasitic ticks off the backs of zebras.

B. Birds feed off the insects that are stirred up from the grasses as cattle move through.

C. A polar bear catches a seal for dinner.

D. A tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat.

Monitor and apply fix up strategies

How do temperature and salinity affect deepwater currents? question 15 options: as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.

Adding more tributaries to a local river basin can have what effect?