They find shells that other crabs have left behind and use them
The rate and direction of reactions are greatly influenced by the Law of Mass action or molecular concentration because they relate to the same principle
The correct answer is the suprachiasmatic nucleus of the hypothalamus. The suprachiasmatic nucleus, as the name suggests, is the part of the hypothalamus located in right above above the optic chiasm. The main function of the suprachiasmatic nucleus is mainly responsible for the circadian rhythm of the body therefore the physiological activity on daily cycles.
A scientist would use, C. Weather Balloon.