Fill in the blanks with the appropriate transition.
I eat meat, ______my brother is a vegetarian.

The correct answer is: Whereas

The correc answer is 'whereas'.
'Whereas' is used to show the contrast between two opinions or information. Hence, the correct transition from the first clause to the second clause is 'whereas'.

However and whereas are both words used to depict contrasting ideas.
Whereas is used when there is a need for a contrast between two ideas. Example: Sam likes to travel, whereas his wife likes to stay at home.
'However' is similar to 'nevertheless'; meaning 'despite what is being said'. It depicts the contrast between two independent clauses. 'However' is usually a conjugation used at the beginning of the sentence. Example: Tom injured his knee in the race. However, he managed to finish the race.