Why is brazil the “giant of south america? "

Brazil is the largest country in South America and the fifth largest nation in the world. It has an enormous coastline with a 4500-mi. / 7400 km. extension along the Atlantic Ocean.

This country offers a great variety of places and cultures including the very interesting Afro-Brazilian culture who settled in the Northeast of Brazil. The Brazilian people maintain traditions and rituals from their African ancestors, but have mixed them with the Portuguese influence; the results are beautiful music, dances, clothing, and food. Sorry if i'm wrong.

it's d it has funded political instability

b is the right answer for this question.