Surgical needles are classified according to their shape; a size of circle shaft within an x, y axis; their point; and their eye. in what type of closure will a 1/2-circle round taper needle be used

Abdominal closure

Explanation:

The needle has a higher taper ratio and a lower tip angle which makes it sharper. The sharpness (taper-point) of this needle is neccesssary for smooth penetration of tissues such as subcutaneous layers and abdominal viscera, so as to minimize the potential damage of fascia.

it is the second option.