Final answer:
Physics is the science that deals with energy and matter, as well as their interactions with space and time, serving as the foundational science for other fields.
Step-by-step explanation:
The applied science of energy and matter is Physics. Physics is fundamentally concerned with the interactions between energy, matter, space, and time, and seeks to uncover the fundamental mechanisms underlying every phenomenon. In the context of scientific fields, Physics is considered a natural science and is referred to as the most basic or fundamental of sciences due to its focus on general truths of nature that all other natural processes appear to follow.