The answer would be D - boom and bust cycle. In a biological framework with two predator and two prey species, hypothesis predicts two manners by which the species' populace elements can end up coupled. On the off chance that the two predators eat both prey, at that point prey populaces will waver together, blasting when predators are uncommon and smashing when predators, looked with a prey excess, blast thus. In any case, if every predator eats a different prey, and the two prey species contend, hypothesis says the prey populaces will sway out of adjust from each other, as initial one, at that point alternate, commands assets.
luteinizing hormone
Ovulation. Estrogen levels peak towards the end of the follicular phase. This causes a surge in levels of luteinizing hormone (LH) and follicle-stimulating hormone (FSH). This lasts from 24 to 36 hours, and results in the rupture of the ovarian follicles, causing the oocyte to be released from the ovary.
hope this helps :)
Answer:
Arousal theory
Explanation:
Arousal theory is a theory of motivation and according to this theory people are motivated to perform actions because they want to maintain an optimum level of physiological arousal. There is a unique arousal level for each person. When the arousal level drops below this level, the person seeks for some sort of stimulation in order to elevate it up to the optimum level.
The same is the case of Juan in the question. Sky diving gives him a unique level of arousal and for maintaining it he practices the diving even he is tired after a long day of work.
