Questions & Answers about La vacuna és per a la mascota.
Both nouns are feminine singular, so they take the feminine singular definite article la.
- la vacuna = the vaccine
- la mascota = the pet
Catalan, like Spanish and French, often uses the definite article more regularly than English does. So la mascota is perfectly normal where English might sometimes just say the pet or even omit an article in other contexts.
És is the he/she/it is form of the verb ser = to be.
The accent is important because it distinguishes és from es:
- és = is
- es = a reflexive/pronominal particle, often meaning something like oneself, itself, or part of passive/reflexive constructions
So in this sentence, és must have the accent because it is the verb.