Answer: growth
Explanation: The growth stage of a product's life cycle is marked by increase in demand and hence rise in revenue generated by such product. At this stage of product life cycle, the product seems to have gained or won the heart of consumers. The growth stage is usually experienced after extensive market research and launch of a product. Once it gains the attention or popularity among consumers, revenue increases and the need to raise expenditure for promotional purposes arises so as to gain firm attention and shrug off competition from similar products.
