Which involves a chemical change? 1.separating hydrogen and oxygen from water

2.evaporating sugar from sweetened water

3.filtering sand from water

4.distilling pure water from salt water

1

Explanation:

because you are changing the chemical makeup of the water by pulling out the two chemicals

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.