Which answer below is correct?
เลือกคำตอบเดียว
1. The Earth covers the atmosphere. It is very thick layer of mixed gases which make up the air we breathe.
2. Land covers 80 percent of Earth's surface.
3. Oceans cover about 10 percent of Earth's surface.
4. The biosphere is the part of Earth's atmosphere, land, and oceans that supports any living plant, animal, or organism.