Because if the cherries are eaten them the seeds/pit will be eaten as well which will be carried by whatever ate it and pooped out and can make more of its kind but it is different with wind and water do you also want that answer?
STP condition mean we have P=1 atm. T=273K. R=ideal gas constant, but make sure you use the one that has the same units of pressure, temperature that you are using. In this case R=0.0821 L*atm K^-1mol^1. You are provided with n=2.1 moles.
V=nRTP
Input your values and solve.
