Fill in the Blanks (Reading & Writing)

Houseplants kept indoors are especially —proneaddictedeagercapable to root rot when their pots lack proper drainage. Gardeners are therefore advised to water —sparinglysparesparingsparingly enough only once the topsoil feels dry, rather than following a fixed schedule. Overwatering remains the single most common —causereason whyeffectcausation of of houseplant death among first-time owners.