Question

the striated appearance of skeletal muscle results from
the sarcoplasmic reticulum.
the transverse tubule pattern.
the perimysium arrangement.
actin and myosin arrangement.
cisternae placement.

Explanation:

Skeletal muscle striations come from the highly organized, repeating arrangement of thin (actin) and thick (myosin) protein filaments into sarcomeres, which create the alternating light and dark bands visible under a microscope. The other structures listed support muscle function but do not cause the striated appearance.

Answer:

actin and myosin arrangement.