Do I need to perform cardio for fat loss?
No, cardio is not required for fat loss.
To lose body fat, a simple caloric deficit is required. This deficit can be achieved by restricting dietary intake, or increasing energy output in the form of exercise. It is much easier to create a deficit by reducing calories versus performing exercise.
Cardio does provide cardiovascular health benefits, so may be something to consider adding to your training routine. Performing some CV exercise 3 times per week for 20 minutes will convey health benefits.
Cardiovascular exercise can be performed in many ways, including brisk walking, running, bicycling, swimming, or any activity that raises your heart rate continually for the duration of the exercise. Additionally, there are more advanced methods of cardio, see “further reading”
Steady State and Interval Training by Lyle McDonald