Ichthyosaurs, now extinct, were aquatic reptiles with dorsal fins and tails, similar to those of fish. their most recent ancestors were terrestrial reptiles that had neither dorsal fins nor aquatic tails. the dorsal fins and tails of ichthyosaurs and fish are ichthyosaurs

answer; /// the answer to the first question is (b) it began when people first deliberately seeds; /// and (d); // it gave people a steady food supple for the first time;

answer; substantive law;

stable food supply,social structure, government,religion,culture/art,technology and writing/language;