Which of Leonardo Da Vinci's inventions were the most important or impactful on the world? (please only one invention) Please please answer in a short paragraph and include how your selection impacted or changed the world in some way. Ty <3

Which life stage is often defined by a feeling of having a set course in life and an established career?

Aresearcher proposes to conduct a study at a foreign site. the research has been determined to be exempt from the federal regulations by institutional policy. according to federal regulations, is review required at the foreign site? if a proposed study qualifies for exemption, federal regulations do not require review at the foreign site where it will be conducted but still require review at the u.s. site by the institution’s irb. if a proposed study qualifies for exemption, federal regulations do not require review at the foreign site where it will be conducted. if a proposed study qualifies for exemption, federal regulations do require review at the foreign site where it will be conducted. if a proposed study qualifies for exemption, federal regulations do not require review at the foreign site where it will be conducted, but still require review by the institutional official at the local site.

What is a capital crime? its not social studies but they don't have criminal justice