Answer:a. A timer to signal how long to brush teeth
Explanation:
Stimulus control of behavior occurs when the performance of a particular behavior is controlled by the presence or absence of a discriminative stimulus. For example, the presence of a stop sign (a discriminative stimulus) at a traffic intersection increases the probability that "braking" behavior will occur.
Answer: so diamonds are important to use for tools
Explanation: One of the most common uses of a diamond, besides being made into jewellery, is the use of it in the industrial industry. Due to a diamond's remarkable strength, they have become extremely effective as cutting, polishing and drilling tools.
The mouth is the beginning of the digestive tract. In fact, digestion starts here as soon as you take the first bite of a meal. Chewing breaks the food into pieces that are more easily digested, while saliva mixes with food to begin the process of breaking it down into a form your body can absorb and use. Hope I’ve helped ;)
The level of organization that is the highest is: Organism, Organ System, Organ, and Tissue.
C would be you're answer, it is the "highest" out of all of them.