Final answer:
Bicycling is the best activity to help Yoko become a faster runner due to its focus on leg strength, cardiovascular endurance, and consistent, repetitive motion that is similar to running.
Step-by-step explanation:
To reach her goal of becoming a faster runner, Yoko should engage in an activity that develops speed and endurance. Among the options provided, bicycling would be the best choice. Bicycling builds leg strength, increases cardiovascular endurance, and emphasizes repetitive motion similar to running which can improve Yoko's overall speed.
Activities like archery will not provide the kind of physical conditioning necessary for speed improvement in running, as it is a skill-based sport focusing on precision and steadiness rather than speed or endurance. Football includes sprinting and agility which can be beneficial, but it might not offer the consistent, focused speed training Yoko is looking for. While swimming is excellent for building cardiovascular strength and overall fitness, it targets different muscle groups and the resistance of water is quite different from the resistance experienced during running.
Therefore, bicycling is the most effective cross-training activity for a runner looking to increase speed due to its specific physical demands that closely align with running.