If our biceps contract, and our triceps relaxes, what way is our arm moving?

Answer 1

It's a concentric contraction which means your bicep will shorten and tricep will lengthen and your lower arm will move toward the bicep in a curling motion.

If you're using this info for an assignment, you can impress the teacher by saying it will result in flexion of the forearm to the upper arm.

Answer 2

It’s been flexed