Answer:
Male infertility:
Overheated testicles: Due to undescended testicles, the sperms are not produced correctly and hence cannot perform their function. Such conditions lead to Immobile sperms. Hence, leading to infertility.
Female infertility:
Ovulation disorders: Ovulation disorders causes disturbances in the release of the egg from the ovaries. Polycystic ovary syndrome is a type of hormonal disorder which can cause trouble in the egg to be released from the ovaries.
It is important to consider the source of health information because anyone can write information down on the internet or in journals. This information may be incorrect and harmful to the human body. It is best to know that your information is coming from a reliable, trustworthy source that knows what they are talking about over an unreliable and untrustworthy source. If you look for information on how to get rid of a headache and stumble upon a unknown website that is untrustworthy then you could possibly end up causing your body more harm then before. Knowing who is behind a certain information holds that person/people accountable if your are further harmed using their information but it also put you at less risk for harm.
Hope this helps :)
Adaptive immunity can be acquired during either 'naturally' (by infection) or 'artificially' (through deliberate actions such as vaccination). Adaptive immunity can also be classified as 'active' or 'passive'
I think it might be A, but i'm not sure so there's a big possibility that I'm wrong. Sorry I wasn't much help :(