Crude oil: Through drilling wells
Coal: Through surface and underground mining
Natural gas: Through hydraulic fracturing
The correct answer is option A, that is, theories.
A restricted explanation of a phenomenon is referred to as a hypothesis. A statement regarding an observed phenomenon or a unifying concept is considered as a law. A law differs from a scientific theory in that they do not postulate an explanation or mechanism of the phenomenon, they are just a filtration of the outcomes of recurrent observation.
However, a scientific theory refers to a thorough explanation of the observed phenomenon.
Student X hears the alarm first because sound travels faster in solids than in gases.
<h3>Speed of sound</h3>
Sound is a wave, as such, sound waves are able to travel across long distances. The speed of sound is greatest in solids since the gases have a high density owing to the fact that the molecules are closely packed.
Now, we can infer from this that student X hears the alarm first because sound travels faster in solids than in gases.
Learn more about speed of sound: brainly.com/question/15381147
The present is the key to the pats because what you have done in the past is what has now brought you to where you are now, it was the stepping stones