True or false blood draining from the mouth is an indication of a serious head, neck or spinal injury

The best and true answer to go with is true.

The speed of  sound:   sound travels  at different speeds depending on what it istraveling through. of the three mediums (gas, liquid, and solid)  sound waves travel the slowest through  gases, faster  through  liquids, and fastest  through  solids.

Plants, sunlight, growth and artificial sunlight