Question

the words also, however, instead, and therfore are examples of _

Answer 1

transitional words?

Answer 2

if this is multiple choice, look for that option.

Answer 3

They are adverbs or also conjunctions, known as conjucts.

Answer 4

The closest word to define these would be conjunctive adverbs.
What subject in english are you particularly studying, grammar? If you are in the conjunction section, then the answer should be conjunction. Likewise for adverbs ( would be conjunctive adverbs)