Explanation:

- Option 1: John Harrison

- John Harrison is known for inventing the marine chronometer.

- His invention revolutionized sea travel by allowing accurate timekeeping, crucial for determining longitude.

- Option 2: William Harvey

- He is celebrated for discovering the circulation of blood in the human body.

- His work laid the foundation for modern physiology.

- Option 3: Friese Greene

- He was an early pioneer of motion pictures.

- He is known for his work on early moving image technology.

- Option 4: Robert Koch

- Koch is recognized for his work in microbiology.

- He identified the bacteria causing anthrax, cholera, and tuberculosis.