expert
someone who knows a lot
participant
someone who takes part in an activity
area
part of a country, city or town
widespread
affecting or including a lot of people or places
survival
the fact of continuing to live or exist
task
a piece of work, especially something unpleasant or difficult
visual
something that you can see
beneficial
something helpful or useful
assist
help
respond
to say or do something as an answer or reaction
image
the way that people think someone or something is
significantly
by a large amount
publish
to make information available to the public
establish
to bring into existence
role
job
detect
to discover or notice something
stress
to emphasize something
occur
to happen
contact
to have communication with someone
complex
having a lot of different but connected parts
factor
one of the things that has an effect on a particular situation, decision, etc.
logical
using reason
abandon
to leave behind or run away from something
trace
to find the origin of something
aspect
one part of a subject, situation,etc.