how to destroy spawn objects in collision in unity and respawn them code example

Example 1: unity3d on collision destroy object

Here's both ways to destroy the gameObject, or the gameObject you collide with.
void OnTriggerEnter(Collider col){
Destroy(col. gameObject);
}
void OnTriggerEnter(){
Destroy(gameObject);
}

Example 2: unity destroy object on collision

void OnCollisionEnter2D(Collision2D coll)
}
   // Check if we have collided with the enemy
   if (coll.gameObject.tag == "Enemy")
   {
      Destroy(coll.gameObject);     
   }
}