What is the concept a logger is using when he removes a particular fraction of trees on a job site in order to allow a certain amount of light to penetrate the forest floor for the younger trees?

Maximum sustainable yield.

Explanation:

The logger is applying the principle of maximum sustainable yield to increase the forest trees yield.

Maximum sustainable yield in forestry is a method of harvesting that enables more productivity in the forest, where older trees are chop down, so that younger ones can access the much needed resources like sunlight and land nutrients.

the united states has a federal government. the president is the head of the federal government of the united states. however, each state forms its government for administration purposes. the powers of the state governments are exercised within restricted state boundaries. and citizens participate in this government by voting.

its tr3way you already know