. Discussion Topic -- Animation is used in many industries such as
education, architecture, and medicine.

Discuss the role and need of
animation in the motion picture industry or video production industry.

Due today

B: , but

Explanation:

In order to best combine the sentences, a comma and the conjunction but (, but) should be included to join two independent clauses. The word tricky  in the first clause, and the word worthwhile in the second  express the idea of a contrast between the tho clauses, which are related. The appropriate conjunction is one that indicates contrast.