Which muscles extend or straighten the arms at the elbows? A. quadriceps (quads)
B. triceps brachii
C. rectus abdominus (abs)
D. latissimus dorsi (lats)

B. triceps brachii

Explanation:

the triceps brachii is the muscle in the back of the upper arm that extends the arm and fixes the elbow during fine movements

because health skills are tools and strategies and also practical skills are also something you need to learn (like tools and strategies) and put it in reality.