How to find out if the player is touching the 5th object in the pool to the solider?

Question

Unity

In general there is a pool of 5 objects. And there is a player. How can I find out if the Player is touching the 5th object in the pool. Like I did it

public Collider colider;
    void Start()
    {
        colider = pool[4].gameObject.GetComponent<BoxCollider>();
    }

but here's how to find out if this colider touches the player?

Answer 1

Does the fifth object have a collider? Let the object itself say that it has touched the player. And tells him what is required (number in the pool).