revival/game/Assets/Scripts/Traps/FallingRocks.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class FallingRocks : MonoBehaviour
{
    Rigidbody rb;
    public float speed;
    [SerializeField] private DeathZone _dz;

    private void Start()
    {
        rb = GetComponent<Rigidbody>();
    }

    // Use OnTrigger to make the "rocks" fall to the ground. Rate of fall can be controlled with speed variable.
    private void OnTriggerEnter(Collider other)
    {
        if (other.gameObject.CompareTag("Player"))
        {
            rb.velocity = Vector3.down * speed;
        }
    }

    // Use OnCollison to call respawn method from DeathZone script.
    private void OnCollisionEnter(Collision collision)
    {
        if (collision.gameObject.TryGetComponent(out PlayerDeath playerDeath))
        {
            playerDeath.Respawn();
        }
    }
}