Concept:A Portuguese explorer named Pedro de Sintra is the one credited with discovering the coast of Sierra Leone in the
15th century.
Explanation:In
1462, King Afonso V of Portugal sent Pedro de Sintra on an expedition down the western coast of Africa.
During this voyage, he sighted a mountainous peninsula near what is now Freetown, Sierra Leone.
He gave it the Portuguese name "Serra Leoa," meaning "Lioness Mountains," because the hills resembled resting lions.
Later, that name gradually became Sierra Leone on European maps.
The other explorers listed do not match this achievement: Vasco da Gama was famous for the sea route to India, Christopher Columbus reached the Americas in
1492, and Ferdinand Magellan led the first voyage around the globe.
Thus, the correct historical figure is Pedro de Sintra.
Answer:D. Pedro de Sintra