Which of the following defines an animation "increase-font" that increases the font size from 5px to 20px?

A.
```css
@keyframes increase-font {
from {
font-size: 5px;
}
to {
font-size: 20px;
}
}
```

B.
```css
@keyframes increase-font {
0% {
font-size: 5px;
}
100% {
font-size: 20px;
}
}
```

C.
```css
@keyframes increase-font {
0% {
font-size: 5px;
}
50% {
font-size: 12.5px;
}
100% {
font-size: 20px;
}
}
```

D.
```css
@keyframes increase-font {
start {
font-size: 5px;
}
end {
font-size: 20px;
}
}
```

For defining an animation increase-font from 5px to 20px is using a CSS keyframes animation with from { font-size: 5px; } to { font-size: 20px; }. Thus the correct option is "A) CSS keyframes with from { font-size: 5px; } to { font-size: 20px; }".

Explanation:

The correct choice that defines an animation increase-font that increases the font size from 5px to 20px is A) CSS keyframes with from { font-size: 5px; } to { font-size: 20px; }. This is a CSS animation technique, with keyframes that control the intermediate steps in a CSS animation sequence. The from and to selectors are used to define the starting (5px) and ending (20px) points of the animation.

The other choices involve JavaScript, HTML, and jQuery, none of which will correctly define an animation solely for increasing font size from 5px to 20px.

Hence, "A) CSS keyframes with from { font-size: 5px; } to { font-size: 20px; }" is the correct option.

Question:

Which of the following defines an animation increase-font that increases the font size from 5px to 20px?

A) CSS keyframes with from { font-size: 5px; } to { font-size: 20px; }

B) JavaScript function increaseFont() { font-size: 5px; } to { font-size: 20px; }

C) HTML tag with start="5px" end="20px" attribute

D) jQuery animation { fontSize: '5px' }, { fontSize: '20px' }

Learn more about CSS keyframes here: brainly.com/question/36235294

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