why its called transforms unity code example

Example 1: c# transform

using UnityEngine;public class Example : MonoBehaviour
{
    // Moves all transform children 10 units upwards!
    void Start()
    {
        foreach (Transform child in transform)
        {
            child.position += Vector3.up * 10.0f;
        }
    }
}

Example 2: how to reference a transform unity

//how to reference the position of a gameObject in unity

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

public class ExampleScript : MonoBehaviour
{
	private Transform player;
    
    private void Start()
    {
        player = GameObject.Find("Player").transform;
    }
}