> 1. America contains many countries other than the USA. Are you a native English speaker? "America" in the singular is universally understood to be equivalent

> 1. America contains many countries other than the USA. Are you a native English speaker? "America" in the singular is universally understood to be equivalent to "the US". You have to use "Americas" with an "s" to refer to the two continents combined, or "North America"/"South America" to refer to them individually.