The most credible source in terms of researching the effects of smoking is letter b, research article in a scientific journal. It is because a credible source means that it is valid or could be relied on in which the research article is, because it has been researched and holds validity of which contains proof. Other choices does not correspond to the question for they don't hold any validity or proof in the topic that could be reliable.
A. Logos, because he is using a description to provide evidence to support his agrument
To show an image and not contextualize it. So simply you can only put an image out if you're going to use and explain it. You also can't be too vague
Answer:
Extrinsic motivation is driven by external factors , which will make people do things to gain external benefits. Thus, the scenario that exemplifies extrinsic motivation is the fact that Lacey ran into a heated shop to warm up, when the temperature suddenly dropped. What made Lacey react in that way so that he could take shelter from the weather ? An external factor: extremely cold temperature. The other examples stand for intrinsic motivation since the drive that activates a certain behaviour in those people comes from within their own selves: not feeling like answering the door; feeling guilty and confessing ; and loving animals and volunteering for rescuing them.