Final answer:
Kinesin is the molecular motor that is known to travel along microtubules towards the plus end, distinguishing it from dynein, which moves towards the minus end, and from actin and myosin, which interact in a different system of cell motility.
Step-by-step explanation:
The molecular motor known to mostly travel along microtubules to the plus end of the microtubules is kinesin. Unlike dynein, which typically moves towards the minus end of microtubules, kinesin predominantly moves towards the plus end, which is generally oriented away from the center of the cell. In contrast, actin is a protein that forms filaments that serve as tracks for the motor protein myosin, and myosin itself is not a molecular motor that travels along microtubules.