Chlorine-36-labeled fertilizers are applied to a plant-growing field for the fertilizers.
accumulation of
O application of improved
O production of
preparation of improved

Explanation:

Chlorine-36 has been widely used for dating old groundwater. The 36Cl used for this purpose is produced in the atmosphere by the interaction of cosmic rays with argon atoms. ... Groundwater recharge carries the 36Cl into the subsurface where the radiometric “clock” is set.

real, smaller and upside-down.   so the answer should be b.

momentum of soft ball three times less than baskey ball