Answer: d. double-blind
Explanation:
A double blind study can be define as the study in which both the researcher and participant do not know which participant is receiving a particular treatment. This method is useful as it prevents the bias in the results of the experiment.
The given situation is the example of double-blind study. Here, the participants as well as the researcher do not know which group of subject are receiving bacteria in the yogurt and which group is not receiving.
Katrina learned about curling by watching and focusing on the techniques used by the olympic players. By watching so much, she learned the movements and basic rules of the game. This is an example of visual learning which is also cognitive learning :-)
The correct answer is early detection. It is because in order to prevent or develop certain diseases, the person should have an early detection or diagnosis in means of finding a cure or solution to the disease that one experience.
The difference is that cardio focuses mainly on your cardiovascular system which is vital in activities such as running, swimming etc. Strength training is mainly based on well, strength. How much weight can be lifted. so the difference really speaks for itself. A runner will mostly do cardio whereas a football player will mainly focus on strength. Both can be used simaltaneously in a work out.
