Answer the following:
$(a)$ Which part of the ear determines the pitch of a sound?
$(b)$ Which part of the human brain is the most developed?
$(c)$ Which part of our central neural system acts as a master clock?

(N/A) The $Cochlea$ is responsible for determining the pitch of a sound by analyzing the frequency of vibrations.
$(b)$ The $Cerebrum$ is the most developed part of the human brain,responsible for higher-order functions like thinking,memory,and reasoning.
$(c)$ The $Hypothalamus$ acts as the master clock of the body,regulating circadian rhythms and various homeostatic processes.