Which of these was used during world war i to gather information about enemy positions?

"harry t. moore (1905-1951) – civil rights activist, leader, and the first martyr of the civil rights movement. fannie lou hamer (1917–1977) – leader in the american civil rights movement; co-founder of the national women's political caucus and freedom democratic party. james farmer (1920–1999) – congress of racial equality."

~kinetic ~potential

explanation:

kinetic and potential energies would be types of mechanical energies.