Answer:
a. The second sentence provides background for the first
Explanation:
According to the first sentence, research has proven that colorful and vivid advertisements helps to attract more people.
Additionally, the second statement says that marketers use various research studies to develop their advertisement.
The relationship between the two sentences is that the second sentence provides background for the first by explaining how the market research has helped.
Answer:
A. Particles no longer move.
Explanation:
An infinitive is the word "to" plus a verb so if you see that in a sentence its probably an.infinitive (I'll give an example below)
Ex: Renee suprised her sister to scare her.
-The infinitive would be "to scare" because it could be mistaken as a verb but the actual verb is "surprised"
Hope that helped!
d. intrapersonal communication
The word <em>intrapersonal</em> means "with one's self". When you talk to yourself, you show an example of intrapersonal communication.