Five-year-old trevor is emotionally disturbed and refuses to communicate with anyone. to get him to speak, his teacher initially gives him candy for any utterance, then only for a clearly spoken word, and finally only for a complete sentence. the teacher is usingthe method ofa) secondary reinforcement. b) delayed reinforcement. c) spontaneous recovery. d) shaping

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.

food source and hunting?

answer; the male's sperm cells have mitochondria, but because the sperm contributes dna but no cytoplasm, no mitochondria are passed to the egg at ferilization;

copper and glass have high electrical conductivity