King Henry Il is best known for his improvements to the English

language.

tax code.

legal system.

army.

The answer is legal system.

Explanation: In his reign he strengthened royal power and limited the authority of the nobility and the church.

When he ascended the throne at the age of 21, he became one of Europe's most powerful sovereigns. He found his domain shaken by incessant feudal struggles since his grandfather's death.