Answer:
Benefits from related & unrelated diversification. 
Explanation:
Firms' benefit(s) from related diversification : 
- Building & developing market power - By sharing the  related diversification going on in entire industry. 
- Sharing activities & market linkages with other businesses - Associated diversification implies forward & backward linkages. 
Firms' benefit(s) from unrelated diversification : 
- Leveraging & enhancing different core competencies, USP - By Focusing on self paced unique diversification 
- Creating a different ostentation brand - Creating a strong brand, capable of becoming a market leader, rather than market follower 
Key concepts explaining firm success or failure from either diversification are implicit within above explanation.