Is a process called chemosynthesis, microbes at the base of the foodchain convert chemicals from the vents into usable energy.
The factors are muscle Force - Velocity Relationship, motor
units recruitment, Length-tension relationship, angle of pull and Active and
passive insufficiency. When muscle is contracting (concentrically or
eccentrically) the rate of length change is significantly related to the amount
of force potential.
The syrinx. It is an organ found in almost all song birds.
The heat!
the amount of heat you use will determine its effect of the crystal. therefore the heat is the independent and the crystal is the dependent