Collide with one object and activate a script on another

I have some lava in my game. I want this lava to move when collided with. However I cannot add another collider onto my lava gameobject as I already have one so the player dies when the lava is collided with. So I need to get the code that makes the lava move from another script. is there a way to do this?

This is my script for the lava movement with “lavaMove()” being the method I would like to have activate when I collide with the other gameobject

using UnityEngine;
using System.Collections;

public class LavaMovement : MonoBehaviour

{

public Vector3 m_StartPosition;
public Vector3 m_EndPosition;

public float m_Speed = 1.0F;
public float m_Timer = 1.0F;

private float m_StartTime;
private float m_JourneyLength;
private float m_fracJourney;


void Start()
{
    endPosition();
    m_JourneyLength = Vector3.Distance(m_StartPosition, m_EndPosition); 

}
void Update()
{
    float distCovered = (Time.time - m_StartTime) * m_Speed; 
    m_fracJourney = distCovered / m_JourneyLength;
    
}

void OnTriggerEnter2D(Collider2D other)
{
    Destroy(other.gameObject);
}

void endPosition()
{
    Vector3 currentPosition = transform.position;

    if (currentPosition == m_EndPosition)
    {
        Destroy(gameObject);
    }
}

public void LavaMove()
{
    transform.position = Vector3.Lerp(m_StartPosition, m_EndPosition, m_fracJourney); //Move Lava
}  

}

You can access a script from a object by using GameObject.Find(“name of object”) and then GetCompontent() and then calling the function LavaMove.

If you can already assign the lava object as a gameobject variable it would be nice as GameObject.Find is a expensive method. But here is how it could look like:

GameObject.Find("LavaObject").GetComponent<LavaMovement>().LavaMove();