leurs VS. leur
It turned out I can't tell the difference between those two as I was listening to the following sentence and trying to type it: (Il dirige ces animaux vers leur nourriture.) Why is LEURS wrong? The program says I should pay attention to the gender, but I know neither leur nor leurs indicates masculinity or femininity. Ideas???
"leur" is a determiner (possessive adjective) that agrees in number with the noun to which it refers.
Since "nourriture" ("food") is a mass noun (i.e. almost always singular), then you have to write "leur" (singular form).
With a plural, you have to use the plural form.
ex: "Ce sont leurs chaussures". ("These are their shoes").