Ineed the correct answer, don't guess worth 50 in many ecosystems a shortage of limits the growth of many producers a. oxygen b. water c. bacteria

Producers are organisms, such as plants, that produce their own food, and are then eaten by other organisms.  Water shortages (droughts) limit the growth of many producers.  Without sufficient water, plants cannot undergo photosynthesis.  This limits their growth, and limits the available energy sources for the entire ecosystem.  

Nutrients  are water soluble and they are easy to drained away, so they are no longer available in plants.Many ecosystems limits the growth of many producers nitrogen as the most common limiting nutrient.  (trust me this isn't copied)

So what it will be is.

In many ecosystems a shortage of water limits the growth of many producers.

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Regards, ShaggySnaps

examples of nucleic acids are deoxyribonucleic acid (dna) and ribonucleic acid (rna).

i think it is d. objects resist changes in their state of motion.