Ow can we account for the growing number of a?left-tendinga regimes in Latin America in recent years?

Hi again,

I would like you to write about the following question.
How can we account for the growing number of a?left-tendinga regimes in Latin America in recent years?

I want to emphasize the following points:
1) Please write a short and direct answer because it an exam question
2) write it with simple English language

Thanks in advance,