Correct option is A
The waxing phase of the moon refers to the period after the New Moon, during which the moon appears to grow thicker and thicker in the sky, eventually becoming a Full Moon. During this phase, the illuminated portion of the moon increases each night, moving from a crescent shape to a full, round moon. This process takes approximately 14 days. The opposite phase, where the moon appears to decrease in size, is known as the waning phase.