True. The sensation of a frequency is commonly referred to as the pitch of a sound. A high pitch sound corresponds to a high frequency sound wave and a low pitch sound corresponds to a low frequency sound wave. ... Such sound waves form the basis of intervals in music.
The answer is A only because immigrants have increased and so has boarder security.
Answer:
because Science and technology gives you solid proof. ... But that is not the case with humanity and social sciences. It is perspectives, attitudes, and emotions.
1 is a depressant, but a specific drug is alcohol and 2 is a hallucinogenic such as LSD or ecstasy
