In which phase is the full illuminated face of the moon visible on earth?
a) new moon
b) full moon
c) waning gibbous
d) waxing crescent

Full Moon is the answer, letter B.

When the full illuminated face of the Moon visible on Earth, it is on the Full Moon phase.

>New moon                         - the illuminated side of the Moon is away from the Earth. only  the shadowed side can be seen. 

>Waning gibbous               - the Moon is less than fully illuminated, but, is more than half.

>Waxing crescent               - first sliver of the Moon that we can see.

21 stacks

step-by-step explanation:

divide 630/30

21 stacks

enjoy!