for each topic I need short essay from 4 to 5 sentences

86. Explain the basics of portfolio strategy. Identify the best approach to diversification using this strategy. Be sure to explain your rationale for arguing that the specified approach to diversification is the best.

87. What are the four kind of skills that companies look for in managers. 88. What did the Hawthorne Studies prove about groups?
89. How did the Industrial Revolution change jobs and organizations?

90. Discuss Mary Parker Follett’s methods of dealing with conflict.