How to move to an object in Unity?

Question

C++ / C#

It is necessary that the "Herbivorous" object follows the static "Meal" object.

As I understand it, the coordinates are not read, and the object moves constantly to other coordinates. And constantly to the same.
It seems to be not difficult, everything is clear, but the following script does not work.

The code

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

public class pursuit : MonoBehaviour
{
    public Transform Target;
    public float Speed;
    [Tooltip("Как близко приближаться к Target")]
    public float RelaxDistance;
  float step = 0;
  void Start () {
    Update();
  }
    void Update()
    {
        var dir = Target.position - transform.position;
        if (dir.sqrMagnitude > RelaxDistance*RelaxDistance)
        {	
      Vector2 current_position = transform.position;
      Vector2 target_position = Target.position;
            step = Speed * Time.deltaTime;
            transform.position = Vector2.MoveTowards(current_position, target_position, step);
            //transform.LookAt(Target);
        }
    }
}

Screenshots of objects and their movements.