Answer:
Yes, he is correct.
Step-by-step explanation:
Given,
Michael's home is 12 feet below sea level,
And, his mother's home is 12 feet above sea level,
That is, with respect to sea level Michael's home is towards north direction and his mother's home is towards south direction.
Thus, the position of Michael's home with respect to sea level = - 12,
And, the position of his mother's home with respect to sea level = + 12,
Since, the elevation is measured vertically.
⇒ Their home are at opposite elevation,
Hence, their home are at opposite elevation because of they are in opposite directions.