“making a cartoon is not a piece of cake.” This means that creating cartoons is:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. A tough challenge.
Reference line: “Even celebrated cartoonists like RK Laxman admit that making a cartoon is not a piece of cake.”
Explanation: The phrase “not a piece of cake” means something that is not easy. In context, it implies that creating cartoons is a tough challenge.
Hence, the chosen option will be correct