Final answer:
Before the 1970s, cereal commercials featured animated jingles or short question-and-answer sessions. Afterward, significant changes occurred, including increased advertising budgets and the use of popular cartoons as advertisements.
Step-by-step explanation:
The differences between cereal commercials made before and after the 1970s can be attributed to various factors. Before the 1970s, cereal commercials often featured animated jingles or short question-and-answer sessions. However, after the 1970s, there were significant changes in the television industry, including a massive increase in advertising budgets and the emergence of children's programs that had tie-ins with specific products. Additionally, cable television allowed for more targeted advertising, and the 1980s saw a shift towards using popular cartoons as advertisements themselves.