What characterizes the inventive acts being protected by patents?

The correct choice highlights that the inventions eligible for patent protection must not be a naturally occurring phenomenon. This is a fundamental principle in patent law, which requires that inventions be the result of human ingenuity and should represent a new and useful application or process that has been created intentionally by individuals. This ensures that the patent system rewards innovation and creativity rather than granting monopolies over things that occur naturally, such as laws of nature, physical phenomena, or abstract ideas.

For an invention to qualify for a patent, it must demonstrate novelty, non-obviousness, and utility, and it must be a product of human efforts rather than simply found in nature. This limitation encourages inventors to develop new and innovative applications rather than seeking protection for discoveries that lack a creative element or human innovation. By preventing natural phenomena from being patented, the law fosters an environment where genuine advancements in technology and knowledge are recognized and protected.