Me
how can timber be renewed?
a. pruning old trees
b. starting a tree plantation
c. starting a controlled fire
d. clear-cutting forest areas

A. pruning old trees

Timber is a valuable source of wood. It is of high economic value. Large number of wood are cut to meet the needs of the wood. Pruning is a practice of selective removal of certain parts of the trees like branches, buds and roots. It is a method of timber renewal. The old trees with dead wood can be used for obtaining timber by pruning of dead branches prone with diseases, this will improve the quality of the wood, which can be used as a source of timber.

to figure the total magnification of an image that you are viewing through the microscope is really quite simple. to get the total magnification take the power of the objective (4x, 10x, 40x) and multiply by the power of the eyepiece, (usually 10x)