Which of these methods can be used to extract natural gas? 1. Underground mining
II. Tar sands extraction
III. Hydraulic fracturing

A. I, II, and III

B. III only

C. Il only

D. II and III only

Look at the figure above. which atmospheric layer has around 80 percent of the mass of the earth's atmosphere? (hint: it's where the clouds seen on earth are formed.) a. exosphere b. troposphere c. stratosphere d. thermosphere

Plz will mark! the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Individuals do not compete directly for resources, but are prey for the same predator