1. Dietary choices:
The excessive consumption of sugary drinks and processed foods is a major factor causing obesity. These foods are often high in calories and low in essential nutrients, making them a poor choice for a balanced diet. 

2. Sedentary lifestyle:
Technology, such as smartphones, video games, and streaming services have reduced physical activity levels among youth. Hours spent sitting and engaging in minimal physical activity contribute to weight gain.

3. Genetics:
Genetic factors can influence a person's susceptibility to obesity. Certain genes may affect metabolism, fat storage, and appetite, making it more challenging for some individuals to maintain a healthy weight. 

4. Insufficient sleep:
Young people who do not get enough sleep of seven to eight hours are at a higher risk of becoming obese.

5. Medications:
Certain medications used to treat various health conditions, can lead to weight gain as a side effect. Young individuals with a genetic predisposition may be more susceptible to medication-induced weight gain.

6. Lack of nutritional education:
Most young people are unaware of healthy eating habits, the negative impact of consuming excessive junk food, or the nutritional value of foods and their impact on health. This can result in poor dietary choices and portion control sometimes contributing to weight gain. 

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