An action with a stimulus and reflex response is an involuntary action
Where v is the volume(in L) and t is the temperature(in °K)
Out of the five major mass extinction, one is Cretaceous-Tertiary extinction (K-T extinction). It happened 66 million years ago marked by the end of the Cretinous period.
A, because the shape of it forms and arc much like a H2O molecule.
All scientists try to base their conclusions on data and measurements.