10 missing words · auto-graded · aim for under 90 seconds
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Scientists study the natural envir
to understand how ecosystems func.
Many species depend on one another, so the loss of a single popul
can affect the whole system. Researchers collect data care,
analyse it stat,
and publish their find
so that others can veri
the results. This process of continuous observ
and testing is essent
to reliable sci.