Which describes one of oxygen's roles in Earth’s atmosphere? allows fuels to burn

forms clouds that produce rain

is the gas that animals exhale

is used by plants to produce food

Based on the text, what is a similarity among the schools in colombia and spain? private schools require uniforms. directors decide the school attire. there are three types of school uniforms. girls can choose to wear pants or skirts.

Which idiom best completes the sentence? en que el retiro es un parque emblemático de madrid. a. estoy harto b. estoy de acuerdo c. estoy en camino d. estoy en las nubes

Write 4 sentences using the imperfect tense. use 2 regular verbs and 2 irregular verbs.