According to LeChatelier’s principle, if a chemical system in equlibrium is disturbed,

the system will react in whatever way increases the amount of reactants and decreases temperature.

the system will change in whatever way will increase the effect of the disturbance.

the system will react in whatever way reduces the amount of reactants and increases temperature.

the system will change in whatever way will reduce the effect of the disturbance.

The answer to that would be magnesium

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later