Yoga:

Yoga is a mind and body practice. Various styles of yoga combine physical postures, breathing techniques, and meditation or relaxation. ... It involves movement, meditation, and breathing techniques to promote mental and physical well-being. There are several types of yoga and many disciplines within the practice.

The main purpose of Yoga is; The fundamental purpose of yoga is to foster harmony in the body, mind, and environment. Yoga professes a complete system of physical, mental, social, and spiritual development. For generations, this philosophy was passed on from the master teacher to the student.

Pranayama:

Pranayama is the ancient practice of controlling your breath. You control the timing, duration, and frequency of every breath and hold. The goal of pranayama is to connect your body and mind. It also supplies your body with oxygen while removing toxins. This is meant to provide healing physiological benefits.

Vinyasa:

Vinyasa is an approach to yoga in which you move from one pose directly into the next. There's a flow to a Vinyasa yoga session, though the specific poses and the pace of the flow vary from one instructor to the next. You may also hear the term Ashtanga yoga used interchangeably with Vinyasa.

Vinyasa means a gradual progression or a step-by-step approach that systematically and appropriately takes a student from one point and safely lands them at the next point. It issometimes described as the “breathing system,” or the union of breath and movement that make up the steps.