help me answer this questions in a concise manner and please don$$t use AI$.$

$-$ Why are industries fragmented? What are the primary ways in which companies can turn a fragmented industry into a consolidated industry

$-$ What are the key problems in maintaining a competitive advantage in embryonic and growth industry environments? What are the dangers associated with being the leader in an industry?

$-$ What investment strategies should be made by: $($a$)$ differentiators in a strong competitive position, and $($b$)$ differentiators in a weak competitive position, while managing a company$$s growth through the life cycle?