Which of the following is an active ATPase enzyme?

The head of the myosin molecule contains ATPase, an enzyme that catalyses the hydrolysis of ATP (adenosine triphosphate) into ADP (adenosine diphosphate) and inorganic phosphate. This release of energy from the hydrolysis of ATP provides the energy necessary for the myosin head to undergo a conformational change and participate in muscle contraction by interacting with actin filaments. It's a crucial step in the molecular mechanism of muscle contraction.