Fill in the blanks with the appropriate Phrasal Verb from the options…

The correct answer is Option (3) → keep off

A phrasal verb is a verb joined with a small word such as up, out or together. The two words together have a new meaning.

As a snake may be hidden in the garden, people are advised not to walk on the grass, that is, to keep off it.
Complete sentence: A snake might be hidden in this garden. You are advised to keep off the grass.

Phrasal verb	Meaning	Example
(1) keep out	not to enter a closed place such as a room or an area. One keeps out "of" a place, and grass is something one walks on, not enters.	The guards told the visitors to keep out of the factory.
(2) keep under	to keep control over someone or something. It does not fit "the grass".	The police kept the angry crowd under control.
(3) keep off (answer)	to stay away from something, not to step or go on it	Please keep off the wet floor.
(4) keep up	to continue at the same level or speed. It has nothing to do with avoiding a place.	Keep up the good work.