Carolyn joins arbitrar consultants as a sales trainee. her manager sends her an e-mail outlining her role and responsibilities and the specific tasks she will be in charge of at the company. this is an example of communication.

The answer is written communication.

Explanation:

Written communication can be both formal and informal; in this case, the tone is clearly formal.

One important feature of written communication is that it's usually taken as the final word, which means it can't be taken back es easily; however, the rise of instant messaging has led to a more natural and intimate use of written communication. That's why professional and academic related messages are typically sent via e-mail.  

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.