Answer:
London smog results from a high concentration of sulfur oxides in the air and is caused by the use of sulfur-bearing fossil fuels, particularly coal. This type of smog is aggravated by dampness and a high concentration of delayed particulate matter in the air.
Explanation:
So, the answer would be B or D.
But, it is most likely B due to dampness.
Consuming every subgroup every day is not necessary
Hope this helps!
-Payshence
Answer:
C
Explanation:
Trilobites were alive the longest time ago, so they would be found in the oldest rock layer.
