The burning of coal to generate electricity has been good in some ways and bad in others. the electricity has allowed for an improvement in many areas of life, but the burning of coal is also responsible for a great deal of pollution. which activity solve the pollution problem through the use of new technology ?

There are many new ways in the current era for consumption of energy. Some things could include

- Solar Energy

*Pros : Clean Sustainable energy , Good for the environment and is basically renewable energy

*Cons : Requires land space, It could ask be quite expensive & may produce low energy depending on the locations weather.

- Wind Powered Energy such as Wind turbines

*Pros : Wind turbines produce up to 6 million kWh in a year that can produce electricity for more over 2,000 households | Low cost | All it needs is wind!

*Cons : Same as Solar Energy; it takes up space | The propellers could harm wildlife such as birds and can cause noises that could do damage to the human ear.

- Wave Energy : Essentially what a Wave energy is, is like thw wind energy but the waves help move an underwater propeller throughout all day to create energy. There are more then 5 machine types and concepts over the world that work differently so they all have different pros and cons. But mainly the majority use little space and dont rely on surface weather mainly currents.

the answer to your question is:

c. complementary base-pairing