So they can know which is which because that person's life can depend on it.
Answer:
C)Biceps
Explanation
The biceps is the flexor, and the triceps is the extensor of your elbow joint.
When the server's score is an even number, he serves from the right service court. When his score is an odd number, he serves from the left service court.
I think the answer to your question is B because In general, an adult bed bug is reddish-brown with a long, oval-shaped body that's about the size and shape of an apple seed. Bed bugs may be flat or they may look like tiny brown balloons. Hope that helped:))