Fluoride prevents what? 9 grade health

Which of these is most likely to prevent pregnancy? a. tracking of female body temperature to identify ovulation times b. proper condom use c. male withdrawal before ejaculation d. proper spermicide use

Which of the following is not a possible cause of conduction deafness? a) cochlear nerve degeneration b) middle ear infection c) impacted cerumen d) otosclerosis

How are people today protected from poop 50 points