The system known as triangles trade involved

The system known as Triangles Trade involved America, Europe, and Africa.

Explanation:

Triangular trade explains the trade that takes place among three ports or regions. Triangular trade took place between America, Europe and Africa. During 17th and 18th centuries the triangular trade was proposed by introducing new cultures into America. Triangular trade rectifies the trade imbalance between the regions involved in trade.

Slaves, crops and manufactured goods are exchanged in the triangle trade between America, Europe and Africa.

European products are sent to Africa in return of slaves. The slaves were sent to America and involved in agricultural work.

answer; collective security;

i think it is the third one.