how to activate object via script unity 2d code example

Example 1: unity c# set gameobject active

gameObject.SetActive(true)

Example 2: unity how to set gameobjkect enabled

//This is for unity
GameObject.SetActive(true);

Example 3: unity enable gameobject

GameObject.Find("PlayMenu 3").SetActive(false);
// you could also store a GameObject as  variable