The holiday is nearly as significant as Christmas in many Spanish-speaking regions like Puerto Rico, Spain, and Latin America, and is also celebrated in other predominately Christian nations like Russia.
Number 21 it’s sounds the most grammatically correct
We need to know what the lesion is about but the second one is telling you how can we get rid of discrimination. If you don’t have any idea how to explain here is a example! (You can copy my sentence if you want lol)
Ex. Unas de las maneras de eliminar la discriminación es tratar todos con igualdad! También podemos a explicar como es importante a tratar todos igual. Tienes que ser persuasivo para convencer a mas personas. Otra manera es, decirle las cosas positivas de igualdad y las cosas negativas de discriminación.