What describes the primary action of the gastrocnemius?

The gastrocnemius muscle primarily facilitates two key actions: plantar flexion of the foot and flexion of the leg. Plantar flexion occurs at the ankle joint and involves pointing the toes downward, which is essential for movements like standing on tiptoe or pushing off the ground when walking or running. Additionally, since the gastrocnemius crosses both the knee and ankle joints, it also assists in flexing the leg at the knee joint when the foot is planted. This dual functionality makes option B the correct description of the gastrocnemius's primary actions.