A condition in which bones become weak and brittle.
Answer:
Concentration. Selective attention, maintaining that attentional focus over time, having awareness of the situation, and shifting attentional focus when necessary.
Explanation:
Answer:
is a blind, neutral experiment
Explanation:
In Science, to have results in which you can trust, always need to be a comparative ( in this case the creatinine supplementation and the other powder). To be a serious experiment, need to have the same activities, duration and the participants need to "blind" to know which substance they are really taking, so they need to train as usual, and after some time the results will show if there is a significant difference.
Because of age and the fact that everybody is different.