Which feature suggests that a substance is basic? The pH is less than 7.
The pH is 7
The pH is 0.
The pH is greater than 7.

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.

blue

light-years

magnitude

i think the answer would be d