Innovation is the process of introducing new ideas or promoting change through a new idea or object. There are two main types of innovation: discovery and invention. This is a guiding principle of Americans not to settle and to remember that things can always improve or be enhanced. Through this spirit of innovation, Americans are always working to advance the fields of science, medicine, and technology.
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A food chain follows one path of energy and materials between species. A food web is more complex and is a whole system of connected food chains. In a food web, organisms are placed into different trophic levels.