Answer:
Explanation:
A reliable source is one that is based on strong evidence, providing a thorough, well-reasoned theory, argument, discussion, etc. Scientific, peer-reviewed articles or books for students and researchers -written by researchers. Original research, sufficient bibliography
Answer:
Compared with human vision, these snakes can sense electromagnetic waves that have:
3. a lower frequency and a longer wavelength.
Explanation:
Human eyes are not able to detect the infrared region of the electromagnetic spectrum. We can experience it as heat when, for instance, we get close to a hot object. <u>The snakes mentioned in the passage, however, have special sensory organs that can detect infrared, which means they sense waves that have a lower frequency and a longer wavelength than the ones visible to us. Let's compare infrared to what is detectable by human eyes:</u>
<u>Visible: wavelength: 400 nm – 700 nm; frequency: 790 THz – 430 THz.</u>
<u>Infrared: wavelength: 700 nm – 1 mm; frequency: 430 THz – 300 GHz.</u>
<u>The longer the wavelength, the lower the frequency.</u>
Answer: A. The problem and solution organizational pattern creates a mood of hope and possibility; this persuades Americans that they must act to secure a more certain future.
Explanation: In the given excerpt we can see a text with a problem and solution organizational pattern, the problem is the necessity of having a free and peaceful world and the solution is that the peace-loving nations must make an effort to uphold laws and principles on which alone peace can rest secure. This organizational pattern creates a mood of hope and possibility and this persuades Americans that they must act to secure a more certain future, so the correct answer is option A.