The trade winds converge in the region of the ITCZ, producing convectional storms that produce some of the world's heaviest precipitation regions. The ITCZ moves north and south of the equator depending on the season and solar energy received
Inter Tropical Convergence Zone (ITCZ) commonly referred to as Doldrums by the sailors is the region around equator where calm, windless weather prevails.
ITCZ is caused due to the converging Trade Winds and the rising air. ITCZ is generally found along the equator, it keeps moving and follows the Sun's overhead position with a delay of 1-2 months. Doldrums region is considered favorable for the navigation by the sailors.
So the 1st image is a map with the countries you are talking about in the question that is labeled. Let me know if this helps and/or if you need any more help! :)
Explanation:
Try and use the shapes of the countries on the labeled map to figure out the names of the countries on the unlabeled map
