Viruses are not living organisms because they lack the ability to produce.
Answer:
Oral cavity
Explanation:
its first organ from which food enter
The answer is: "<span>Warming may slow or halt the formation of cold dense water in polar regions, reducing the delivery of nutrients to depth, and thereby reducing productivity in deeper zones."
Global warming is caused by the accumulation of greenhouse gases in the atmosphere primarily by human activity. These increases the temperature in the polar regions will warm the water (and subsequently halting the formation of cold water). The melting of ice will release nutrients and stimulate the growth of phytoplanktons, and these organisms will compete with the nutrition in the deeper zones (the phytoplanktons and algae will reduce the available nutrients for deep sea creatures) and therefore decreasing the productivity.</span>
