Difficulty: Hard

Average Score: 38%

What happens to the animation when the style is invoked?

Rationale

It moves horizontally across the screen.

The CSS animation defined by the `@keyframes anim_01` specifies changes in the `Left` property, moving the element from `0px` to `600px`, indicating a horizontal movement along the x-axis.

A (It moves vertically across the screen.) YOUR ANSWER

This choice is incorrect because the keyframes only modify the `Left` and `top` properties. The vertical position (`top`) remains constant at `0px`, indicating no vertical movement occurs during the animation.

B (It scales in size by 0% and then by 600%.) YOUR ANSWER

Scaling is not addressed in the provided CSS code. The animation explicitly modifies the `Left` position, with no properties related to scaling (like `transform: scale()`) mentioned. Therefore, this option does not reflect the behavior of the animation.

C (It moves horizontally across the screen.) CORRECT

This choice accurately describes the animation's effect. The keyframes transition the `Left` property from `0px` to `200px` at `50%`, and then to `600px` at `100%`, resulting in a clear horizontal movement across the screen.

D (It scales in size by 200% and then by 600%.) YOUR ANSWER

Similar to choice B, this option is incorrect because the CSS does not include any scaling transformations. The animation strictly involves horizontal movement, with no changes to the size of the element.

Conclusion

The animation specified in the CSS code effectively moves the targeted element horizontally across the screen, as indicated by the changes in the `Left` property. The incorrect options misinterpret the animation's intent, which focuses solely on lateral movement rather than vertical motion or scaling effects. Understanding these distinctions is crucial for effectively utilizing CSS animations in web design.

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