Final answer:
Temperature affects fish activity by influencing their physiology and behavior. Higher temperatures increase enzyme activity and metabolism, leading to increased activity levels, while lower temperatures decrease enzyme activity, resulting in reduced activity levels. The correlation between temperature and fish activity can be seen in the population densities of organisms, which increase at lower temperatures.
Step-by-step explanation:
The correlation between temperature and fish activity is that temperature affects the physiology of fish and influences their behavior. As body temperature rises, enzyme activity in fish increases, which leads to increased metabolism and activity levels. On the other hand, as temperature drops, enzyme activity decreases, resulting in decreased metabolism and reduced activity levels.
An example of this correlation can be seen in the population densities of organisms in a pond. When the temperature is lower, the population densities of all organisms, including fish, increase in response to the environment. This is because lower temperatures create optimal conditions for the growth and reproduction of organisms.