Which of the following to determine how easily magma flows?
a.
the amount of silica in the magma
b.
the diameter of the pipe
c.
the size of the crater
d.
the number of vents on the volcano

Using complete sentences, describe the central economic problem facing all humans. why does this require people to make choices? how can this result in opportunity costs?

Why did macarthur want to invade china? why did truman oppose this?

Can someone me choose a broad topic and area of focus i am really doing this as a tally to see which one most people pick ok water pollution global warming endangered species atmosphere for the !