look at
phrasal verb.to direct your eyes toward something to see it. You use this when you want to focus your attention on an object or person.
phrasal verb.to direct one's gaze toward an object or person to perceive it visually. Always takes a direct object.
“Please look at the board.”
“The students look at the map to find the capital city.”
“When you look at the evidence presented, the conclusion becomes difficult to ignore.”
The phrasal verb is transitive and requires a direct object after the preposition 'at'.
look at vs look for — Look at directs the eyes toward something visible, while look for is the act of searching for something missing.
look at vs watch — Look at is the act of directing your eyes toward a stationary target; watch is the act of observing something in motion or progress over time.
The verb 'look' is intransitive and requires the preposition 'at' to connect to an object.