One of the cratons, or relatively stable areas, in the South American tectonic plate is known as the what Shield?

Question

Two tectonic plates and small corners of two others lie under the African continent. These are the African Plate, part of the Eurasian and the Arabian Plates and which other?

Answer 1

Guiana
The Guiana Shield underlies Guyana (previously British Guiana), Suriname (previously Dutch Guiana) and French Guiana (or Guyane), much of southern Venezuela, as well as parts of Colombia, and Brazil.