Can someone please help me?

Which verb correctly completes this sentence? natalia a mis hermanas. a. conoce b. sabe c. conocen d. saben

What does it mean to conjugate a verb? how do you conjugate verbs in spanish?

Answer the questions using complete sentences, and explain when we use ‘gusta’ and when we use ‘gustan’. ¿te gusta el chocolate? ¿te gustan los libros? ¿te gusta estudiar? pls answer in basic sentences im a beginner and do flvs