Why did business leaders begin the practice of vertical integration?

So they could could control the cycle of a product from creation to sale.

Explanation:

In vertical integration, businesses will make an effort to own every entities that is needed to complete all of their operation.

For example, let's say that you own a successful Burger restaurants. So far , you manage to obtain profit by buying the meat from local markets and resale it in the form of delicious burgers.

In this case, vertical integration can be used to increase your profit by creating your own meat production farm. This will make able to control cycle of a product from creation to sale.  Your material cost will also become lower and you will increase your profit margin.

can you explain a little further maybe give multiple choice? ?

this statement is true.

forests are public goods, available for everybody. when usage of such a good becomes interesting for consumers and its usage increases, there can be a risk of overexploitation. it is a non rival good therefore, if one person consumes the good it does not reduce the availability for subsequent consumers.

these caracteristics require the establishment of measures in order to prevent the destruction of a commonly owned space, for example, to restrict the amount of people that have access to the same time.