your eating too much or not exercising enough
I have no clue. Maybe you should take it to the vet.
By eating something it shouldn't, eating too much, exercising too much, abuse by caregivers, etc It could also easily be something genetic.
Simply hormones, stress, anything. I doubt that there is anything wrong.
You look bigger by eating too much of the wrong foods and by not exercising enough.
Of course not. You get obese by eating the wrong foods, eating too much, and not exercising enough. Doing homework doesn't stop you from eating right and getting exercise.
You take it to the vet and find out what's wrong with the dog.
A diet that is bad for you. That could mean not eating enough, eating too much, eating unhealthy foods. The list goes on.
No, that is not correct. First of all 'much' is wrong with 'they'. It could have been "How many are they?. But if you have to ask the price of something you could ask- "How much is it for?" or "How much do they cost?" for more than a single item. In an informal way you might ask "How much for them?" or just "How much?"
No, but eating too much red meat could lead to cancer or cardiovascular problems.
too much meat
Too much eating of the wrong kind of foods and not enough activity and excercise.