The correct answer is: D. an industry with average growth higher than the growth of the economy.
A growth industry is an industry that is experiencing a higher rate of growth than the overall economy. This can be due to a number of factors, such as new technologies, changing consumer preferences, or government regulations. Growth industries are often attractive to investors because they offer the potential for high returns.
Option A is incorrect because it specifies a specific rate of growth, which is not necessarily required for an industry to be considered a growth industry. Option B is incorrect because it focuses on demand, while growth industries can also be driven by supply factors. Option C is incorrect because it focuses on capital investment, while growth industries can also be low-capital-intensive.