What is the uses of W3.CSS image classes?

Question :

What is the uses of W3.CSS image classes?

a.  w3-image: It is used to represent a basic style image without any border.
b.  w3-circle: it is used to create circle image.
c.  w3-title: It is used to display the text over an image.
d.  w3-card: It is used to create an image as a card.