Yes, for the correct definition of eating healthy. What actually causes weight loss is a sustained calorie deficit. Exercise is not required and, in fact, is a poor strategy for losing weight.
May be, initially yes. But that won’t sustain for too long as your body will adjust to the food you eat and will start spending less energy.
Exercise does not cause weight loss! Only one thing does that, the under consumption of calories from your body’s daily caloric usage (TDEE or Total Daily Energy Expenditure). Even numerous fitness experts (including the famous ones) don’t really realize when they say “calories in calories out” are by definition saying that exercise does not cause weight loss (think about it logically). That said, appetite and hunger which is a product of hormonal levels and not necessarily an empty stomach can be improved/regulated via exercise. This results in a desire to eat less ultimately causing weight loss. The other way exercise helps is that let’s say you want to lose 1 pound (3500 calories) a week. Instead of having to under eat 20% of your TDEE (without exercise) you may only have to under eat 15% of your TDEE (with exercise). That makes it slightly easier. Since people are different weight and ages those exact numbers may not apply to any specific case but the basic principle does.
Yeah definitely. weight loss is more about your diet than exercise although I would recommend doing the both together. When your body is in a calorie deficit it will drop weight. You should not put your body in a deficit for too long. Give yourself a cheat meal once a week to keep yourself sane. Everything in moderation. Eat healthy try get in exercise and just live life. Don’t worry about your weight too much worry about how healthy and active you are!