There are several theories but the two that seem to stick are that sleep: allows your body to replenish energy stores and repair itself. gives you the chance to save energy. Sleep may also aid learning and give our bodies time to organise all the memories of the hundreds of events we experience every day.
Softwood is also used in the production of paper, and for various types of board such as MDF (medium-density fiberboard). The finer softwoods have many special uses. they are used for making window frames,doors,frames,t.v. stands,flooring and beds.
The strongest type of tree for any situation is a healthy tree suited to the conditions. Proper care increases physical strength, tolerance and longevity. Learning to bend is important.Leaving young trees unstaked to sway in the wind increases trunk diameter, strength and resilience.ardwood Wonders. Gardeners speak of hardwood and softwood trees. Both tree types have similar cells, but hardwoods have special fibrous cells in addition. The added fiber, slower growth and increased density add physical strength and hardness to their wood.