Primary productivity is not limited by
a.
the availability of sunlight
b.
time
c.
the availability of nutrients
d.
access to water

The correct answer is "B".

Primary productivity is the rate at which plants produce organic compounds in an ecosystem. The elements that serve as parameters, in other words, restraint the production of organic compounds are:

the fundamental orders of connecticut it would be the letter b

incident infrared radiation is blocked. visible and ultraviolet radiation heat   earth.

earth radiates infrared radiation. infrared radiation is blocked and heats earth. visible and shortwave radiation heat earth.

earth radiates longwave radiation

longwave radiation is reflected downward longwave radiation heats earth