situated at an altitude of 3,416 m (11,207 ft) in a broad valley of the andes, it is the busy hub of a thickly populated agricultural region where sheep are raised and cereals and tobacco are grown.

Make this proper case
Situated at an altitude of 3,416 m (11,207 ft) in a broad valley of the Andes, it is the busy hub of a thickly populated agricultural region where sheep are raised and cereals and tobacco are grown.