Fill in the Blanks (Reading & Writing)

Recent workplace studies suggest that adding potted plants to an office can —improveimprovingimprovementimproves employee concentration and reduce reported stress levels. Even a single desk plant appears to —enhanceenlargeenrichexpand air quality slightly, while rows of greenery along corridors seem to —exertextendexceedexcerpt a calming effect on staff moving between meetings. Employers who once viewed plants as —meresheerutterplain decoration are now treating them as a low-cost productivity investment.