During a conversation, Jerry told his friend that their favorite rock band was going to perform in their city. However, he could not remember the medium through which he got the information about the show. Jerry was experiencing .

The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.