Explanation

"He is taller than any other boy in the class."

"وہ کلاس کے کسی بھی لڑکے سے اونچا ہے۔"

In this sentence, the preposition "than" is used to compare

the height of the subject "He" with the height of "any other boy in the class."

The phrase "taller than" indicates a comparison in height, with the subject