Write the next sentence in the following story.

How to accelerate weight loss naturally
Combine aerobic exercise and strength training.
A combination of a variety of exercises can help to speed up weight loss. Both cardio and strength training provide you with different types and amounts of calories burned.

OPTIONS:
1). Remember that to lose weight, you need to burn fat and build muscle Aerobic exercise is primarily used to raise heart rate and burn calories immediately. Types of aerobic exercise include: running, walking, swimming, and biking..
2). The benefit of both is it's true you make you burn calories at the same rate, which can make your weight loss easier on your body. Aim to increase your aerobic activity by 50% for healthy weight gains..
3). Some studies show that working out or strength training more frequently can help with weight loss. Aerobic exercises like cycling, swimming, hiking, or dancing are great ways to burn calories without burning all your calories..
4). Talk to your doctor or a medical nutritionist about building a healthy diet and reducing your daily calories. Regular exercise helps you maintain a healthy weight and reduce added calorie intake... The answer should be
1).