Answer:
Blood pressure is higher in arteries than veins, and the elastic layer helps maintain the structure of the artery.
Explanation:
i think
If you are referring to selection pressure, when the selection pressure decreases, there will be weaker forces of natural selection. The angler fishes without the favourable traits would not be that strongly selected against and vice versa. In some cases such as predation selection pressure, the population of angler fishes in the habitat may increase
