Final answer:
The plural form of "el autobús" in Spanish is "los autobuses".
Step-by-step explanation:
The plural form of the word el autobús in Spanish is los autobuses. In Spanish, the singular form of a noun ending in a consonant typically becomes plural by adding -es to the end. So, in this case, autobús becomes autobuses in the plural form.
Learn more about Plural forms in Spanish