Which of the following described is interval of one- half step?

In Western music, the small interval from one note to the next closest note higher or lower is called a half step or semi-tone.

Explanation:

Three half-step intervals: between C and C sharp (or D flat); between E and F; and between G sharp (or A flat) and A. Listen to the half steps in Figure 4.8.

i believe the answer is: a.  abstract forms were often used to represent human figures.

representing human figures in abstract forms is often used in the geometric period, not hellenistic  period.   during the hellenistic  period,   aesthetic value derived from creating arts which mimic the actual shape of a certain object or individuals.

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