To solve this problem, we need to determine the amount of energy released from glucose during lactic acid fermentation.$\newline$Lactic acid fermentation is an anaerobic process where glucose is converted into lactic acid.$\newline$Let's analyze the energy yield:$\newline \bullet$In lactic acid fermentation, one molecule of glucose is converted into two molecules of lactic acid.$\newline \bullet$The process yields a net gain of 2 ATP molecules per glucose molecule.$\newline$Now, let's compare this with the total energy content of glucose:$\newline \bullet$The complete aerobic oxidation of one molecule of glucose yields approximately 38 ATP molecules.$\newline \bullet$Therefore, the energy released during lactic acid fermentation is $\frac{2}{38} \times 100\% \approx 5.26\%. \newline$This is less than 7%, which corresponds to Option 4.$\newline$Thus, the correct answer is Option 4: Less than 7%.