The amount of energy that remains after the amount of energy used for respiration is subtracted from the total is called

Net primary productivity (NPP)

Explanation:

Net primary productivity (NPP) explains how much energy remain available for plant growth after deducting the fraction used by plants to breathe.

In other words, it's the level in which plants or any other primary producers store the energy in the form of biomass and make it available in the environment to customers.

iron would move it is magnetic there is a mag field around the current in the wire

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach