Which of the following activities is commonly used by firms to persuade consumers that they need a product, thereby potentially increasing consumer willingness to pay?

Identify that advertising is a common activity used by firms to inform, persuade, and remind consumers about their products, often creating or enhancing perceived needs.

Contrast advertising with other options: taxation is a government policy tool, price discrimination involves charging different prices to different consumers, and subsidizing production lowers costs but does not directly persuade consumers.