[Grammar] Spot the error

[isaacbabuk]

The tallest among them expressed a keen desire to sit under the shade of a tree.

Is there an error in any of the parts underlined? How?

Thanks
Isaac

 

[José Manuel Rosón Bravo]

[Not a teacher]

I think that all of the underlined parts are ok.

 

[isaacbabuk]

Okay. Thank you.
Isaac

 

[MikeNewYork]

Please do not name your threads "Spot the error". Use actual words from your question.