سؤال قراءة ستيب محلول — المفردات في السياق (تدريب 8111)
استيعاب المقروء
1) All living organisms need food. They need it as a source of raw materials to build new cells and tissues as they grow. They also need food as a source of energy. Food is a kind of "fuel" that drives essential living processes and brings about chemical changes. Animals take in food, digest it and use the digested products to build their tissues or to produce energy.
What word other than "food" does the writer use to talk about the need of all living things?
