Correct Answer: Gather

Solution : The fourth option is the correct choice.

The meaning of scatter is to separate and move off quickly in different directions, or throw in various random directions.

• Fling means to throw something or someone suddenly and with a lot of force.
• Spray means to spread liquid in small drops over an area.
• Litter means small pieces of rubbish that have been left lying on the ground in public places.
• Gather means to collect several things, often from different places.

Hence, the correct antonym is gather .