Answer: A large amount of energy is lost at each level, so there has to be a limit on the number of trophic levels.
Explanation:
The correct answer is negative
Explanation: Negative reinforcement is a term described by BF Skinner operant conditioning theory. In negative reinforcement, a response or behavior is reinforced by stopping, removing or avoiding a negative result or aversive stimulus.
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Aversive stimuli</em> tend to involve some kind of discomfort, whether physical or psychological. Behaviors are negatively reinforced when they allow you to escape aversive stimuli that are already present or allow you to avoid aversive stimuli completely before they happen.
bi-focal eyeglasses, self-winding clock, parachutes, <span>the hot-air </span>balloon, <span>the </span>safety lock, steamboats, and <span>the </span><span>circular saw :)</span>
Social networking is sites like Facebook or Instagram that allow you to be friends with people from everywhere. You can post pictures, videos, leave comments, and message people.But social networking can effect you negatively for example cyber-bullying. Anyone is vulnerable to cyber-bullying in which the bullies will most anonymously or or even posing as people the victim trust will terrorize the victim inform of everyone on the social networking site. The devastation of the online attacks can leave deep mental scars or even drive people to Suicide. Also another effect social networking has is that it invades our privacy. sites encourage the users to be more open about their personal life’s. Because personal details can be posted and put out there so easily. Many users don’t think about who can possibly what they are posting or saying. You may post something about you drinking at a party and go do a job interview. And they do a back ground check on you and find that picture of you. It can lower your chances of getting a job with them. Even though most sites have the option for your account to be private or control the things other people can see they are often forgotten Also it can be difficult to control and might not work as well as you thought.
Hope this helps.
The wealth of East African city-states was based on Trade.
