Informal speeches or fireside chats on the radio
Answer:
Genetic Code
Explanation:
The environment favors some characteristics of plants, animals and microbes over others.
These character differences are often genetically based so that favored characteristics may increase in the next generation. The shorter the generation time, the faster this evolutionary change can occur.
Hope this helps
B. because the work in one area and are specialized to do that work.
The Bill of Rights is what protects us when we want to buy things.