This is a gibbous moon.
a) crescent
eliminate
b) new
c) waning
d) waxing

Since the question seemed to be incomplete, here's a brief apprehension about phases of the moon which might be of help.

There are several lunar phases namely: New Moon, Full Moon, Waning and Waxing Crescent, Waning and waxing Gibbous, First Quarter, and the Last Quarter.

> Waning--means getting less illuminated each night; waxing means becoming more illuminated each night.
> Waning Gibbous-- less than fully illuminated
> Waxing Gibbous --more illuminated than half

B.) nitrogen fixationnitrogen fixation is the process of nitrogen molecules seeping into the soil and inside plant roots and bacteria. it gives more "life" to plants