Who led the modernization efforts in the British Navy in the early 20th century?

The individual who led the modernization efforts in the British Navy in the early 20th century is known for his influential role as the First Sea Lord, where he implemented significant reforms aimed at transforming the Royal Navy into a more modern and efficient fighting force. This figure advocated for new technologies such as the transition from coal to oil as a fuel source, the development of dreadnought battleships, and improvements in naval tactics.

His leadership marked a critical period in naval history, fostering advancements that ensured the Royal Navy remained competitive during a time of rapid technological change and geopolitical tension leading up to World War I. These reforms helped the navy retain its position as the world's premier naval power and showcased a forward-looking approach to naval strategy and maritime warfare. Thus, the correct answer highlights the significant impact of this leader on naval modernization during that era.