Answer:
1. led slaves to freedom - Harriet Tubman
2. was elected US president four times - Franklin Roosevelt.
3. invented the electric light bulb - Thomas A. Edison.
4. US Ambassador during the Revolutionary War - Ben Franklin.
4. wrote the Declaration of Independence. - Thomas Jefferson.
Explanation:
Harriet Tubman (1820-1913) was a black woman who was born into slavery in Maryland, but who escaped and later took part in 13 rescue missions where she helped 70 other people escape slavery, many of them relatives of hers, through the network known as the "Underground Railroad".
Franklin Roosevelt (1882-1945) was President of the United States for four consecutive terms between 1933 and 1945. However, he didn't live to see the end of his fourth presidential term, as he died shortly after his fourth inauguration. A constitutional reform in 1951 limited the maximum number of terms to two.
Thomas A. Edison (1847-1931) was an American inventor who created many new technologies, such as the electric light bulb (in 1879), the phonograp, the camera, the electric acumulator, among many others.
Benjamin Franklin (1705-1790), one of the Founding Fathers of the United States, was dispatched as US Ambassador to France between 1776 and 1785, through most of the Revolutionary War. He was critical in securing the support of France and in forging a military alliance with them against the British.
Thomas Jefferson (1743-1826), another one of the Founding Fathers of the United States, was a member of the Committee of Five, a group of five people who were designated by the Second Continental Congress to draft the Declaration of Independence of the United States in 1776. Jefferson is credited with writing the first draft of the document. From this version, the Committee made a series of modifications, with the final text being published on July 5, 1776, a day after it was signed.
