Answer:
[tex]\boxed {\tt Gulf \ of \ Mexico}[/tex]
Explanation:
Let's analyze each answer choice.
A. Gulf of Mexico: to the south of North America
B. Pacific Ocean: to the west of North America
C. Atlantic Ocean: to the east of North America
D. Arctic Ocean: to the north of North America
Since we want to find the body of water south of North America, the Gulf of Mexico is the correct answer.