The answer is steamboats! The first steamboat came year 1807 and was invented by John Fitch:)
To answer you question, The two main ingredients are Heat and coolness.
<em><u>Could you add the answer choices next time?</u></em>
Natural resource management is a discipline in the management of natural resources<span> such as land, water, soil, plants and animals, with a particular focus on how management affects the quality of life for both present and future generations.Hence sustainable development can be followed where there is a judicial use of the natural resource.</span>
