Communication. When you communicate with someone you talk to each other. However if you are listening to someone's problems and helping them through something by sharing feelings this can also be caring, so it's up to interpretation.
Finding out if an exercise is safe needs to determine the fitness level of the exercise and how much it takes to achieve the result of the exercise. The person performing the exercise needs to know their endurance level and if they are able to perform the exercise without injury or illness.