The sentence On utilise une gomme pour ___ means "An eraser is used for ___." This question tests knowledge of school supplies and their functions.
A gomme (eraser/rubber) is a tool used to effacer (erase/rub out) pencil marks or writing. This is its specific and primary function.
The other options describe different actions:
mesurer (to measure) is the function of une regle (a ruler)
lire (to read) is an activity, not something done with a specific tool
corriger (to correct) might seem close, but correcting involves identifying and fixing errors, which is a broader intellectual activity. An eraser physically removes marks; it does not correct in the academic sense
The complete sentence is: On utilise une gomme pour effacer - An eraser is used for erasing.
