Because they can results from the new science observations, and it also affected by social, political, and religious convictions.
ENGLISH
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Simple:
- he (think) ===> he thinks
- he (be) ====> he is
The sentence is thus 
He <u>thinks</u> that he <u>is</u> clever.
Learn more;work harder
#Carryonlearning
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<span>"Sound devices, also known as musical devices, are elements of literature and poetry that emphasize sound. The most common sound devices are assonance, consonance, alliteration, rhyme and onomatopoeia." </span>
Classism affects people in poverty because study’s shown that they get judged, degraded etc because they are not “high class”.
Explanation:
The basic form for a book citation is: Last Name, First Name. Title of Book.