deep in thought (adjective)

1. In her painting, the artist depicted a figure deep in thought, lost in their own world.

2. The comic panel showed the superhero sitting on a rooftop, deep in thought about the challenges he faced.

3. In Greek mythology, the god Zeus was often portrayed deep in thought, contemplating important decisions regarding the fate of the world.

4. Why did the mathematician appear deep in thought while staring at the graph? He was trying to find the root of all his problems!