Alan is a fifth grade teacher. He is teaching his students about photosynthesis. He begins by reminding them that plants need sunlight to grow. Later, he continues by describing how plants are able to synthesize food directly from carbon dioxide and water using energy from light. How is he making it easy for his students to listen?

Alan is shifting from familiar to newer information

Explanation:

According to the question, Alan is linking the concept of photosynthesis with requirement of plant for sunlight and then telling synthesization of food in plant with help of water and carbon dioxide following the rest topic.

He is making these connections among certain parts to which student are familiar with so that he can teach them about related new information.Student know basic information to which he is adding more detailed information through transitioning to make them understand concept .    

citizens were able to charge more for their goods and services

answer; epigenetics;