During the 2004 Tsunami, salt water flowed inland plants and insects in the soil. The salt water caused a change in the environment. In this example a change caused a change. A. abiotic, biotic
B. abiotic, abiotic
C. biotic, biotic
D. biotic, abiotic

i d k but from using grammar, i'd go with C because you dont say "a" then put a vowel as the start of the next word, cos it would be an instead

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products