You would use a software tool that looks up the synonyms such as The Thesaurus
Answer:
Population is growing rapidly, far outpacing the ability of our planet to support it, given current practices. Overpopulation is associated with negative environmental and economic outcomes ranging from the impacts of over-farming, deforestation, and water pollution to eutrophication and global warming.
Answer:
Press [Ctrl]+[Shift]+[Esc] and Windows Task Manager will launch instantly
Explanation:
An electronic 
is an application you use to perform numeric calculations and to analyze and present numeric data.
i would say a or b but i think its A
