Final answer:
A custom brush allows more control and variation when creating a cloud background, compared to the Filter > Render > Clouds option. It offers more realistic and customizable cloud shapes and consumes less memory.
Step-by-step explanation:
The subject of this question is Computers and Technology. The student is asking about using a custom brush to create a cloud background instead of the Filter > Render > Clouds option in Tutorial 4: Doohickeys and whatchamacallits. The student provided four possible reasons for using a custom brush instead.
The correct answer is b) Custom brush allows more control and variation. With a custom brush, the user can paint clouds of different shapes and sizes, and easily adjust the opacity and blending modes to create a more realistic and customizable cloud background. This option offers more control and flexibility compared to the Filter > Render > Clouds option, which generates a random cloud pattern.
In addition to offering more control, custom brushes also consume less memory compared to using the Filter > Render > Clouds option. Custom brushes are essentially a small image file that is repeatedly stamped along the brushstroke, whereas the Filter > Render > Clouds option generates a cloud pattern across the entire canvas. Therefore, using a custom brush is more efficient in terms of memory usage.