Answer: Simple that is the only word that would fit here
background info: Synonym study. Concise, succinct, all refer to speech or writing that uses few words to say much. Concise usually implies that unnecessary details or verbiage have been eliminated from a wordy statement: a concise summary of speech.
MAKE ME BRAINLIEST
Answer:
a. on
b. I don't think here a preposition is needed as "This is the key to my room" is a complete sentence.
c. in
d with
Hope it helps!!
Have a nice day:)
