Correct Answer: Gridlock

Solution : The correct choice is the third option.

The synonym for congestion is gridlock, as it specifically refers to a complete standstill or deadlock in traffic, often due to congestion. It implies a situation where the movement of vehicles is entirely blocked, leading to a halt in traffic flow.

• Amplification: This refers to the process of making something more extensive or larger.
• Diversion: This refers to the act of turning aside or redirecting.
• Laxity: This refers to the state of being lax or not strict, not related to traffic congestion.

Therefore, the correct answer is gridlock.