The correct plural form of "la bebida popular" is "las bebidas populares."
Here's the breakdown:
- "La bebida" (the drink) is singular and feminine.
- To make it plural, you change "la" to "las" (the plural feminine article) and "bebida" to "bebidas."
- The adjective "popular" needs to match in number and gender with the noun; therefore, it becomes "populares" in the plural form.
So, the complete correct plural form is "las bebidas populares."