Answer: similar names
Explanation: they have similar name but are still different and thats why their perspectives are different.
In order for a new word to be maintained in your vocabulary you must use it.
Four things to do while proofreading are to check your spelling, grammar, punctuation, and capitalization.
Your question isn't very detailed, if this isn't what you're looking for, please feel free to put in more detail.
Answer:
the exam starts at 3 o'clock. at is the correct answer.
