As a product in the maturity stage of its life cycle, chewing gum brands would most likely require the use of advertising to prompt purchases.

The answer that would best complete the given statement above would be the word REMINDER. Here is the complete statement. As a product in the maturity stage of its life cycle, chewing gum brands would most likely require the use of reminder advertising to prompt purchases. Other options for this question include informative, persuasive, push and pull. 

Generally travels west to east but often shifts to north and south