Spontaneous reactions always result in increased disorder of the system always take place at a rapid rate always release free energy are always exothermic

The correct answer is that it "naturally favor the formation of products".
Spontaneous Reactions is best described as a response that favors the formation of merchandise on the situations under which the reaction is happening. A roaring bonfire is an instance of a spontaneous reaction, for the reason that it is considered to be exothermic (there may be a decrease in the energy of the system as strength is launched to the environment as warmness).

Air enters through the nose (and sometimes the mouth), moves through the nasal cavity, the  pharynx, the  larynx, enters the  trachea, moves through the  bronchi  andbronchioles  till the alveoli.