The answer is: A It increased both her intensity and her workout time.
Intensity refers to how hard you exercise and workout time refers to how long your exercise your body. By adding another mile she would most likely increase the time needed to complete her workout and it would also become harder for her to complete it since her cardiovascular system would have to face more workload.
By adding another mile, she is both increasing the intensity (because she is running an extra mile), while also increasing her workout time (considering the fact that adding distance also adds time).
The fact that "small changes are introduced in the child's environment" can be taken as a good example of behavioral perspective since the ones that work with this idea consider that evironment has an important influence in behavior. They have the conception that when interacting with a given environment an individual can develop certain attitudes and responses.
The answer is source B because it has a listed author who is an expert and it is the governments organization website which are more reliable that a .com website. Source A does not even list the author so you do not know who wrote it could be anyone.
because if you aren't comfortable or you are stressed you may start eating in order to make yourself feel better. Also you may end up overeating, because you might not start to feel comfortable. Emotional eating is harmful so if you emotionally eat find a way to stop.