To answer this question, you need to have knowledge about the history of flight and the pioneers in aviation.
Option A) Leonardo DaVinci - This option is incorrect. While Leonardo DaVinci did sketch designs for flying machines, including gliders, there is no evidence that he actually built and tested a functioning glider.
Option B) The Wright brothers - This option is correct. The Wright brothers, Orville and Wilbur Wright, are credited with designing and building the first successful airplane. They conducted extensive research, including glider experiments, and made significant contributions to the development of aviation.
Option C) Francis Rogallo - This option is incorrect. Francis Rogallo was an American aeronautical engineer who is known for inventing the Rogallo wing, which is used in modern hang gliders and paragliders. However, he did not design the first hand glider.
Option D) Galileo - This option is incorrect. Galileo Galilei was an Italian scientist and astronomer who made important contributions to the fields of physics and astronomy. While he studied the principles of flight and made some theoretical contributions, he did not design the first hand glider.
The correct answer is B) The Wright brothers. They designed and built the first successful airplane and made significant advancements in aviation.