Read the paragraph from the section "Geo-Connection." down below is the paragraph

Lombardi hopes his diving in the Bahamas will help make others aware of this unexplored area. "What it tells us is not only is the world not flat, but there is a heck of a lot of blue out there!" he
says. "It's very, very deep, and there's a whole other dimension that we need to start paying lose
attention to."

Why does Lombardi mention that the world is not flat?
a
to make sure that readers have learned the world is round
b
to emphasize that there are many other things to be learned
c
to describe what kinds of things he thinks about while diving
d
to provide a description of what the ocean floor looks like