A complex system of locks (raises, rises) the water level of the Panama Canal. Select one:
O a. raises
b. rises

The prefix of the italicized word in the sentence is rather difficult

By comparing part 1 and 2 of polar opposites what does it mean by polar opposites

Eating while you drive a.increases your risk of being involved in a collision b.is only risky with heavily packaged foods c.should only be done with food that can be handled easily