Answer: Galaxy A is farther away since it has a wavelength of 710nm as compared to Galaxy B with a wavelength of 685nm nearest to H-alpha emission line with wavelength 653nm.
Gravity pulls more strongly on denser materials so denser materials are at the center of things. Earth's core, at its center, is denser than its crust. The lowest layer of the atmosphere is denser than the upper layer. Earth's liquid metal outer core has convection, which generates the magnetic field.
There might be an increase in the number of opium farms in Southeast Asia because the prices of crops are declining. Many farmers only means of income is farming and with the decline in prices, it makes them to turn to other mean of income. Another reason would be opium prices are high and many make a living off of selling them. The purchasing power of their currency is declining as well. So the answer would be All of the above.
A. elevation
because elevation effects high altitudes.
