Modern cell phones dated back to the 70's more than 4 billion of 6 billion have cell phones and it was important because people could communicate with other people and if they need an emergency than can call BTW i think everyone should have a cell phone : )
Because summer is the travel months were familys travel from north to south or south to north .So to do that they need gas so .
Answer: C. Positive reinforcer
Explanation: Temper tantrum is a phenomenon that occurs in so-called emotional distress, when one is exposed to some negative emotional charge or feeling such as mockery or scolding and the result is an emotional outburst or temper tantrum. Temper tantrum can manifest itself through crying, stubbornness, anger, defiance, violence, etc. The more often this kind of stimulation, i.e scolding, occurs, and more often a reaction such as crying, screaming, stubbornness, etc. occurs. This means that scolding is in fact a positive reinforcement because with more frequent repetition there is also a more frequent response to it in the form of temper tantrum. Although the stimulus itself is negative, the reinforce is positive because with more frequent stimulus, i.e reinforce, behaviour (crying screaming, etc.) in response to the stimulus is increased, i.e it becomes more frequent.
The only one that makes sense is C. Air Pollution.
A monarchy is when a society is ruled by a king and usually a queen. The king is chosen through a royal bloodline. You are either born a king or you have no chance of being king. England is still ruled by a monarchy today.
