Chocolate and biscuits
To gain weight you have to eat more.
Eat more.
Eat more, do weight lifting.
If you don't eat, you're not going to gain weight. The only way to do it would be to eat regularily then eat nothing. Then fat will build up making you gain weight. This is a very unhealthy way to gain weight. It's simple, eat more than you usually do, you gain weight. Eat less, lose weight. Eat the same amount, weight stays the same. Advice for you would be eating three big meals, not much snacking. That way you will get more calories in.
If you eat more calories than you use you will potentially gain weight. If you eat less than you use you will potentially lose weight. If you eat the same as you use your weight should remain stable.
I'm not sure why you think figs would make you gain more weight than ordinary food. to gain weight you need to eat more calories than you spend. You can not gain weight just on figs.
you don't gain weight when you eat very little. you need to exercise and eat little portions of your meal and you will not gain weight, you will gain muscle by working out but not the weight.
Having worms would cause you to eat more but lose not gain weight.
eat more fat, and be less active
you gain weight.
Yes you do gain weight.
You don't gain weight in order to get muscle. You overload your muscles with heavy weight training, and then eat more to fuel the muscle growth.