Answer:
Productivity is smallest in the polar region and highest at the equator.
Explanation:
In general, productivity is highest at the equator and lowest at the poles. At the equator, sunlight is direct throughout the whole year, so plants are able to produce about the same amount of sugar during the whole year. In the temperate region, there are distinct summer and winter seasons. There would be more productivity in the summer and less in the winter, but even at the peak in the summer, there would be less than at the equator. At the poles, there would be very little primary productivity. They only get sunlight for short periods of time throughout the year. The ground also remains frozen so it is difficult for plants to grow there. Therefore, there would be little to no productivity from plants at the polar regions.
