Final answer:
The combining forms pareun/o- and venere/o- are related to sexual intercourse and the transmission of sexually transmitted infections.
Step-by-step explanation:
The combining forms pareun/o- and venere/o- reference concepts related to sexual aspects in medical terminology. Pareun/o- is derived from the Greek root meaning 'lying beside' or 'sexual intercourse,' while venere/o- comes from the Latin word 'Venus,' which pertains to the Roman goddess of love, often associated with sexual love and also gives rise to the term 'venereal,' referring to sexually transmitted infections.
In this context, the correct answer to 'The combining forms pareun/o- and venere/o- mean:' would be B. sexual intercourse. This is supported by the historical usage of these terms, such as the concept of venereal diseases being those transmitted through sexual contact.