Answer:
You could very well have a conversation with them.
Explanation: I don't completely understand your question, but you could speak to them in person, over the phone, online, or even by mail. You would speak to this person when you need to fill a prescription! Hopefully that helps.
White blood cells do. we need a balanced amount of white blood cells to fight off infections!
Answer:
According to kin selection, saving the life of your sister-in-law would do the LEAST for improving your inclusive fitness.