Which half-reaction correctly represents reduction? a) ag -> ag+ + e– b) f2 -> 2 f– + 2e– c) au3+ + 3e– -> au d) fe2+ + e– -> fe3+

b. th3 n4zc4 pl4t3 15 c0nv3rg1ng w1th the s0uth 4m3ric4n pl4t3.

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.