Question

(A) explain how barrier and chemical methods of contraception prevent unwanted pregnancies.
(B) name one bacterial and one viral disease transmitted sexually.​

Answer 1

Explanation:

A) Barrier method prevents unwanted pregnancies by preventing sperms from entering the vagina

Chemical method prevents unwanted pregnancies by changing hormonal balance which in turn avoids formation of eggs

B) Bacterial - syphilis , gonorrhoea

Virus - HIV AIDS , Warts

I hope it helps ☺️