100 ! being safe during exercise is very important. knowing the rules of a game, using the right equipment, and even wearing proper footwear are important to prevent injuries.

what are some best practices for different exercises and sports performed:
at high altitude?
in hot weather?
in cold weather?

as you write your answers, consider the following items:

wearing proper attire
staying hydrated
any other important items, like proper posture, precautions, etc.
2. do these best practices change depending on the person or skill level? explain.

Many safety measures must be ensured while exercising or sporting at different places according to the variation of each places the safety measures vary

At high altitude: At high altitude there will be decrease in the level of oxygen so one must carry oxygen cylinders with them and proper attire must be worn because the dresses can cling to some places and cause accidents and must avoid alcohols and heavy meals

In hot weather: One must drink a lot of water and must remember that they must stay hydrated and wearing proper clothing is also important to run the extreme heat

In cold weather: Should check the weather conditions if the weather is extremely chill and must protect the hands and leg from chillness must take into conditions the postures also

Yes, they change depending upon the persons skill and ability level and the interest they take upon

i believe it is true.        

frequency is the answer