KillPlayer.cs

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

public class KillPlayer : MonoBehaviour
{
    public LevelManager levelManager;
    // Start is called before the first frame update
    void Start()
    {
        levelManager = FindAnyObjectByType<LevelManager>();
    }

    // Update is called once per frame
    void Update()
    {

    }
    void OnTriggerEnter2D(Collider2D other)
    {
        if (other.name == "Player")
        {
            levelManager.RespawnPlayer();
        }
    }
}