To means to update something in order to take advantage of new ideas or new technology.
a.
adapt
b.
modernize
c.
diversify
d.
maintain

The european union was formally established in

Witch of the following volcano hazards is made up of rocky particles about the size of a grain of sand

Acivilization exists for several hundred yeaars, developing its own language. such a civilization probably has been: a. farming corn b. suffering from a lack of contact with the outside world. c. isolated by mountains or some other physical barriers. d. starving from lack of trade.