"The cat jumped over the fence." Which word in the sentence is the preposition?

Everybody knows exercising is necessary and important to keep our health. How much exercise do we need? The exercise intensity is 100% when we are out of breath and can't move anymore. It is said that, in case of 50% exercise intensity, we need to do aerobic for 30 minutes a day 5 times a week. Or in case of 70% exercise intensity, we need to do cardio for 20 minutes a day three times per week. Unfortunately, many people find it hard to have time to exercise on weekdays. From the result of some experiments, it is recommended that we use a bicycle when we go to school, go to work and go shopping. Most exercise intensity in walking is less than 50% and it is not good enough to strengthen our health. On the flip side, the exercise intensity shows more than 60% while cycling. That's because the intensity increases drastically when we pedal a bicycle at the hill and the start. Pedaling a bicycle in a high-speed rotation with a light gear is a key to keep over 60% exercise intensity. It is said that the cycle number we pedal without thinking is between 55 and 60 per minute. According to experiment result, the proper number is between 70 and 75. I have driven to work on weekdays, and it might be time for me to switching to cycle in the future.

Could you help me with a grammar rule? Is there any rule about "such + noun + as"? Should I write an article? For example, "such (a) literary work as…"

I don't like _______ food. I think food should be cooked.