Answer: Flowing rivers have caused boulders and rocks to become smooth. The water rushing against them rounds out the pointed edges.
The 1978 peace agreement between Israel and Egypt was called the "Camp David Accords," since this agreement was presided over by Jimmy Carter at Camp David.
There were of course other factors. While early humans did hunt them a lot due to the profits which they received from it (A lot of food, bones they could use for homes, fur they could use for clothing, etc.), there were also other factors such as less food for them which made them less mobile through different geographical regions, etc. (and therefore more susceptible to being hunted) that had played a part in their extinction.
The correct answer to this open question is the following.
Although you forgot to include the sketches and the options of the question, we can say the following.
Robert Hooke, a famous 17th-century English scientist, published a book of sketches such as the one above. The recent invention that made these observations possible was the microscope.
Robert Hooke was an English scientist who wrote the treatise called "Micrographia." In this work, he helped design a modern microscope for that time with better lenses and improved optical characteristics that facilitated scientific research. In the end, it was Christopher C*ck, the one who fabricated the new microscope.
