The use of is expected to increase in the future.
a.
coal
b.
natural gas
c.
renewable energy
d.
all of the above

The correct answer would be c. renewable energy.

Renewable energy is the energy produced with the help of renewable sources such as wind, rain, sunlight, waves, geothermal energy et cetera.

These resources have a ability to replenish as soon as they are consumed.

They are clean source of energy as they either do not produce pollution or produce in a very small amount.

Hence, they help in achieving sustainability, control pollution, minimizing the drastic climate changes and preventing the resources such as coal, petrol, natural gas et cetera from getting exhaust.

one centimetre is equal to 0.01 metres

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus