Final answer:
Myosin provides the force to move filaments by interacting with actin during muscle contraction.
Step-by-step explanation:
The molecule that provides the force to move filaments is myosin.
Myosin is a motor protein that interacts with actin to generate the force required for muscle contraction.
It undergoes a molecular change that enables it to slide along actin filaments, causing the filaments to move and the muscle to contract.