Correct Answer : Option (B) - Volcano

Olympus Mons is a shield volcano located in Mars' western hemisphere. It is the largest volcano in the solar system at 72,000 ft tall (two and a half times the height of Mount Everest) and 374 miles wide (nearly the size of the state of Arizona).

Correct Answer : Option (C) - Seismology

The movement inside the Earth's crust is studied by seismology. Seismology is the study of vibrations within Earth. These vibrations are caused by various events, including earthquakes, extraterrestrial impacts, explosions, storm waves hitting the shore, and tidal effects.

Correct Answer : Option (D) - A large icy planet proposed in the outer Solar System

Planet Nine is a hypothetical planet in the outer region of the Solar System. Its gravitational effects could explain the unusual clustering of orbits for a group of extreme trans-Neptunian objects, bodies beyond Neptune that orbit the Sun at distances averaging more than 250 times that of the Earth.

Correct Answer : Option (A) - Firewood

Correct Answer : Option (D) - Wind energy

Correct Answer : Option (B) - Smoke and fog

The word "smog" is a combination of the words "smoke" and "fog." Smog is a mixture of many pollutants, mainly ground level ozone and fine particulate matter.

Correct Answer : Option (B) - Extinct volcano

Dormant volcanoes have not erupted for a very long time but may erupt at a future time. Extinct volcanoes are not expected to erupt in the future.

Correct Answer : Option (A) - London

The Great Smog of London, or Great Smog of 1952, was a severe air pollution event that affected London, England, in December 1952.

Correct Answer : Option (C) - high temperature

Correct Answer : Option (D) - Butane

Butane, a highly flammable, colorless, easily liquefied gas used in gas-type lighters, cigarette lighters and butane torches.