A rainbow. it comes out after rain which is normally dark and depressing
ENGLISH
<u>=================================================================</u>
<u></u>
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
<u>==============================================================</u>
I'd say A.
The word "describing" or almost anything ending with "ing" signifies an action occuring now, or in the present. B, C, and D use "when describing" which leads to the assumption that these things listed are taken into account while the landscape is being described but answer choice A uses "when they describe" which is passive rather than active.
Answer:
reread the whole paragraph
Explanation: