The central nervous system and the peripheral nervous system
Answer:The producers, who manufacture their own food through photosynthesis or chemo synthesis, are at the bottom of the pyramid. The second level is made up of herbivores, or principal consumers. In the following portions of the pyramid, secondary and tertiary consumers, omnivores and carnivores, are found.
Explanation:
The answer is D. Telegraph, telephone, cordless phone , mobile
<span>They can rais the number of crops produced in an amount of time, they can also reduce the need for harmful pesticides. However, they may cause more allergies in humans, producing a health risk.</span>
