Answer:
To begin with, equally important
Step-by-step explanation:
In English language, a transition is defined as a word or phrase that relates two paragraphs or sections of a text. They are connectives that serve to carry the reader onto the next line of thought in the passage.
The best choice of transition better presents the author's flow of thought and aids the passage to make sense. The two transitions presented in the answer enables a seamless flow of thought in the passage.