Which of the following is a valid CSS selector?

Which CSS property is used to set the opacity of an element?

A). A) opacity

B). B) transparency

C). C) visibility

D). D) alpha

What does the CSS property 'background-color' control?

A). A) The color of the text

B). B) The color of the background

C). C) The size of the font

D). D) The alignment of text

What does the CSS property 'display' control?

A). A) The layout of an element

B). B) The color of text

C). C) The alignment of text

D). D) The size of the font

Which CSS property is used to set the thickness of a border?

A). A) border-width

B). B) border-style

C). C) border-color

D). D) border-size

Which CSS property is used to add space around an element's content?

A). A) padding

B). B) margin

C). C) border

D). D) space

Which CSS property is used to control the spacing between lines of text?

A). A) line-height

B). B) text-spacing

C). C) line-spacing

D). D) spacing

What does the CSS property 'text-decoration' control?

A). A) The alignment of text

B). B) The size of the font

C). C) The decoration of text

D). D) The color of text

What does the CSS property 'border-color' control?

A). A) The color of the border

B). B) The style of the border

C). C) The thickness of the border

D). D) The alignment of text

Which CSS property is used to set the text alignment?

A). A) text-align

B). B) align-text

C). C) text-justify

D). D) justify-text

What does the CSS property 'margin' control?

A). A) The space between elements

B). B) The space between an element's content and its border

C). C) The space between an element's border and the next element

D). D) The size of the font