Answer:
Living organisms, including animals and plants, primarily consist of a few major elements: carbon (C), hydrogen (H), oxygen (O), and nitrogen (N). They also contain trace amounts of other elements like phosphorus (P), sulfur (S), calcium (Ca), potassium (K), sodium (Na), magnesium (Mg), iron (Fe), chlorine (Cl), zinc (Zn), and copper (Cu) for various biological functions.