B, they burned undergrowth
they burned undergrowth ;
Early farmers changed their environment by using slash-and-burn agriculture, where they burned undergrowth to clear land for farming. This method enriched the soil with nutrients from the burned vegetation. The correct choice for the question is B: They burned undergrowth.
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Penjelasan:60 kg = ... gr60 kg = ... ton1 kg = 1000 gr1 ton = 1000 kg1 kg = 1/1000 ton60 . 1000 = 60000 gram60 . 1/1000= 60 ÷ 1000= 0,06 tonJadi,60 kg = 60000 gram60 kg = 0,06 ton