Answer:
Equilibrium is a component of skill-related fitness that is directly connected to a standing long jump because it allows the individual to balance its body to perform the movement without falling to the ground.
Step-by-step explanation:
The reason behind this answer is that in the first place, Equilibrium is not a skill, a mechanism of reflex. It can be trained, but it is not a skill itself because it is not a specialized task. Therefore, it is considered a component of other movements including fitness skills. Now, it is connected to fitness skills like standing long and jump because they require the individual to keep its balance without losing it to perform those tasks. In other words, it is necessary for these movements and essential for them. Because the individual can't achieve those movements without it.