Cell membrane, because that’s the structure that allows organelles to leave and enter
They would participate in team sports because it helps them learn how to work within a team. It gives them a sense of belonging to a group while building leadership and communication skills, as well as physical fitness. It is a lot easier to work as a team with physical activities because everyone can push each other to get the job done versus you having to motivate yourself.
I wanna say the lithotomy position because that is when you lay on your back with your legs open like you're giving birth. If they wanted to perform something like this, doctors would most likely use the lateral position first.
Hope this helps :)