The fact that young children may mistakenly apply "‐s" to make the plural of a word, as in "the childs are playing," is often taken as evidence that the capacity to acquire the rules of language is

The fact that young children may mistakenly apply ‘s’ to make the plural of a word, as in the ‘childs are playing,’ is often taken as an evidence that the capacity to acquire the rules of language is natural and innate.

Innate is being defined as something to be inherited or that it was inborn. Whereas natural is being defined as something that already exist within in which a person has an innate talent or gift.

b) trade is easy because of the direct line between their major ports. bilateral trade reached 89,6 thousand million.

i got 3,4 and 5 as an answer