The correct answer is Compound verb
Step-by-step explanation:
In grammar, the subject refers to the entity that performs the action, the verb to the action performed and the object to the elements or entities affected by the action. Additionally, each of these elements can be compound if the subject, verb or object integrates is made up of multiple words. For example, a compound subject is "Mario and Joseph", a compound verb is "went and bought" and a compound object is "..read a book and a magazine". This implies in the case of the combined sentence "They wanted to go on an adventure together and decided to visit the South Pole" this uses a compound verb because it includes the verbs "wanted to go" and "decided to visit".