Final answer:
The verb to describe two people sharing the same opinion is 'agree'. Subject-verb agreement is important in English grammar, and collective nouns can take singular or plural verbs based on context.
Step-by-step explanation:
The verb used to describe two people sharing the same opinion is agree. When discussing agreement in English grammar, it's important to also consider subject-verb agreement. For instance, when subjects are joined by 'and', a plural verb is generally used, as in 'Yoga and meditation are effective activities for relieving stress.' In contrast, collective nouns like 'group' can take either a singular or a plural verb depending on whether the group is acting as a unit or as individuals. Moreover, in persuasive writing, sharing the same opinion with many can be represented by phrases like 'getting on the bandwagon' or advocating for a 'majority opinion'. These phrases suggest conformity to a popular trend or belief because many others have the same perspective.