Select the appropriate form of the verb. 1. Dudo que los osos polares (polar bears) (van/vayan) a sobrevivir (survive). 2. Luisa está segura de que (se puede/se pueda) evitar la extinción de algunas especies. 3. No hay duda de que la caza (hunting) (está/esté) afectando algunos ecosistemas. 4. Es imposible que yo (reciclo/recicle) suficiente (enough) aluminio. 5. Es cierto que ustedes (niegan/nieguen) el cambio climático.

vayan

se puede

está

recicle

niegan

Explanation:

Mood is a grammatical concept that organizes verb tenses. The mood that a speaker employs explains the speaker's attitude towards a subject. The three moods in Spanish are indicative, imperative and subjunctive. In these examples, you are employing both the indicative and the subjunctive.

The indicative moods occurs when stating truths or facts. It expresses actions or ideas that are concrete and easily perceived. This is the most basic and most frequently used mood. On the other hand, the subjunctive mood is characterized by expressing actions or ideas that are hypothetical or not concrete. This includes subjective statements, opinions, desires, hopes and wishes.