Can someone help me with this

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

Answer the following questions using complete spanish sentences. ¿quién ayuda al doctor? ¿qué tomas para sentirte mejor? ¿tienes fiebre ahorita? *note: this is a practice activity. completing this activity will not only prepare you for future tests and assessments but, more importantly, it will enhance your language ability. this activity will not count towards your grade.

Which of the following is incorrect when performing overhead work?