Answer:
Plastics are non-corrosive in nature because they do not react with air, water or other substances. They do not get corroded even if they come in contact with strong chemicals. This is because of their non-reactive nature with most materials. For example, the cleansing chemicals that we use at home are stored in plastic bottles, instead of metal containers. I know its late but I still hope it helped. :)
The answer to the question is D
The answer is <span>B. The carbon dioxide level in the city will be higher because the exhaust gases from vehicles release carbon dioxide and there are not many trees to utilize it.
It is known that in photosynthesis, plants use carbon dioxide and convert it into organic compounds. So, in a garden, there will be a lower amount of carbon dioxide than in a city. In the city, vehicles will release it in the atmosphere and if there are not many trees to utilize it, the carbon dioxide level in the city will be higher than in the garden.</span>
The appropriate response is Helicobacter, it is kind of microbes that causes disease in the stomach. It is found in around 66% of the total populace. It might be spread by unclean sustenance and water, however, scientists aren't sure. It causes Peptic ulcers and can likewise bring about stomach disease.
The answer is Keystone. Keystone is a species in which others species in the ecosystem largely depend on, if the species was removed the ecosystem would change drastically.
