Explanation:

Here’s what you need to know about those four options:

- Antoine Lavoisier: Famous as the "father of modern chemistry," but he didn’t synthesize urea. He worked earlier, defining elements and naming oxygen and hydrogen.

- Friedrich Wohler: In 1828, Wohler did something big. He heated silver cyanate (often called silver cyanide by mistake) with ammonium chloride and got urea—an organic compound—from inorganic substances. No living stuff involved. This smashed the idea that only life could make organic compounds. This is your answer.

- Ernest Lawrence: He invented the cyclotron (a particle accelerator) much later, in the 20th century. No connection to urea or this type of chemistry.

- Alfred Werner: A pioneer in coordination chemistry, won a Nobel Prize, but lived decades after Wohler and worked on totally different problems.

Here’s the bottom line: Wohler’s experiment in 1828 changed the way we think about chemistry and life.