Answer
(a) FALSE
(b) TRUE
Work Step by Step
(a) Both $-3$ and $-4$ are negative numbers. Since $-3$ has a lower absolute value, $-3$ is bigger than $-4$. Therefore, the presented inequality is false.
(b) Both $3$ and $4$ are positive numbers. Since $3$ has a lower absolute value, $3$ is smaller than $4$. Therefore, the presented inequality is true.