(Question)
If to ensure that water is safe to drink harmful substances are removed before drinking, then to ensure that water is safe to drink, harmful what are removed before drinking? Answer choices: - leeches - seeds - toxins - currents - bacteria - substances - Roundworms - plants
(Answer)
substances

(Question)
If grapevines are plants that shed their leaves seasonally, then grapevines are plants that shed their leaves? Answer choices: - Winter - during the day - Exfoliation - every season - on random occasion - seasonally - When it's cold - in no seasons
(Answer)
seasonally

(Question)
If decomposers can help form and enrich soil, then what can help form and enrich soil? Answer choices: - Most plants - whales - the Sun - decomposers - swamp vegetation - shrub beds - phytoplankton - fossil fuels
(Answer)
decomposers