Skim this short passage and answer the questions (1-2) below.
The albatross is one of the world's largest flying birds. It also has the largest wings of any bird-up to 3.4 meters from tip to tip. These giant birds use their wings to ride the ocean winds. They can fly for hours without rest, or even without moving their wings. Some may even be able to sleep while flying.
Most albatrosses spend nearly all their time in the air. In fact, they only return to land to breed. A parent albatross might fly thousands of kilometers to find food for its young. In its lifetime, an albatross can fly a total of more than six million kilometers.
1. What is the above passage mainly about?
A、where albatrosses live
B、 albatross flying behavior
C、albatross intelligence
D、albatross habitat