Final answer:
The belief that profits tend to breed competition and that excess profits tend to breed ruinous competition is true in business.
Step-by-step explanation:
The belief that profits tend to breed competition and that excess profits tend to breed ruinous competition is true.
Competition from firms with better or cheaper products can reduce a business's profits and potentially drive it out of business. This can lead to a loss of income or job losses for workers.
In market economies, competition is generally seen as a positive force that drives innovation, improves products, and benefits consumers.