Occasionally replacing with is a healthy habit. a) caffeine-free; extra caffeine b) high fat; high sugar c) low-fat dairy; high-fat dairy d) meat; plant-based protein

I think it would be D. Meat; plant-based protein. Both give protein that you need without any added/extra fat or caffeine like the others.

obesity is a result of eating unhealthy junk food which increases the fat content of the body and makes you obess. it is also further because of not doing proper exercise and not participating in any physical activity.