Final answer:
The safe types of stretching are Static and Dynamic (option A). Static stretching is done by holding a specific position, while Dynamic stretching involves controlled movements to prepare the muscles for activity. Ballistic stretching is not considered safe due to its reliance on momentum and potential to cause injury.
Step-by-step explanation:
The types of stretching considered to be safe are "Static" and "Dynamic". Static stretching involves holding a stretch in a comfortable position for a period of time, usually between 15 to 60 seconds. This type of stretching is beneficial for cooling down after exercise and for increasing flexibility. Dynamic stretching, on the other hand, involves moving parts of your body and gradually increasing reach, speed of movement, or both. It is typically used as a part of a warm-up to prepare the muscles for movement and activity.
Ballistic stretching uses the momentum of a moving body or a limb in an attempt to force it beyond its normal range of motion, which can be unsafe and is not typically recommended for most people. It is important to perform stretches in a controlled and safe manner to avoid injury.
Hence, the answer is option A.