3d
abstract
answer
ask
assistance
background
blue
business
communication
concept
conceptual
confusion
design
don
doubt
faq
green
help
human
icon
idea
illustration
information
interrogation
isolated
know
mark
object
over
problem
quest
question
questionable
reflected
render
rendered
search
shadow
shape
sign
solution
support
symbol
t
text
white
who
why
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