The electromagnetic spectrum<span> is a continuum of all</span>electromagnetic waves<span> arranged according to frequency and wavelength. The sun, earth, and other bodies radiate </span>electromagnetic<span> energy of varying wavelengths. </span>Electromagnetic<span> energy passes through space at the speed of light in the form of sinusoidal</span>waves<span>.</span>
The answer is Historical works that are so important they change the way we see the world.
Explanation:
Seminal works, sometimes called pivotal or landmark studies, are articles that initially presented an idea of great importance or influence within a particular discipline.
<span>B) While most modern zoos do not teach animals to perform "tricks," they do train animals to respond to certain commands to make them safer to handle, move and examine.
This sentence keeps all of the verbs in agreement at the end. All three "to handle, move, and examine" are in the same tense and form which is important for the sentence to be correct.</span>
