Answer:
play safe.
wear the right gear.
take breaks.
do not play through pain.
take time off.
This is heavily disputed, and honestly, it varies on a person-by-person basis. Some people are visual learners (so it's effective for them to use videos and pictures to help them study), some prefer being hands-on, etc...
Generally though, I'd say the most effective method that works for most people is through visceralisation. This is the process of associating concepts, words. phrases etc. with your different senses (sound, touch, images...). You can read up more on it by searching up "visceralisation for studying".
Answer:
because they partly copy the original ones thereby using substandard things to make them look like the originals
Cancer is not associated with the AIDS virus
