Vector3

using UnityEngine;

using System.Collections;

public class MoveTo : MonoBehaviour {

    public float speed = 5.0F;

    GameObject player;

    Rigidbody rb;

    Vector3 movement;

    NavMeshAgent follower;

    void Start () {

        player = GameObject.Find ("Player");

        rb = GetComponent<Rigidbody> ();

        follower = GetComponent<NavMeshAgent>();

    }

    void FixedUpdate() {

        Pursuit ();

    }

    void Pursuit() {

        follower.destination = player.transform.position;

        transform.LookAt (follower.destination);

        rb.AddRelativeForce (Vector3.forward.normalized * speed);

    }

}