Check out example codes for "unity resources load". It will help you in understanding the concepts better.

Code Example 1

// To load something from the 'Resources' folder, see examples

// Load a text file (Assets/Resources/Text/textFile01.txt)
var textFile = Resources.Load<TextAsset>("Text/textFile01");

// Load text from a JSON file (Assets/Resources/Text/jsonFile01.json)
var jsonTextFile = Resources.Load<TextAsset>("Text/jsonFile01");
// Then use JsonUtility.FromJson<T>() to deserialize jsonTextFile into an object

// Load a Texture (Assets/Resources/Textures/texture01.png)
var texture = Resources.Load<Texture2D>("Textures/texture01");

// Load a Sprite (Assets/Resources/Sprites/sprite01.png)
var sprite = Resources.Load<Sprite>("Sprites/sprite01");

// Load an AudioClip (Assets/Resources/Audio/audioClip01.mp3)
var audioClip = Resources.Load<AudioClip>("Audio/audioClip01");

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