I believe that it is both myosin and actin.
First to not care about what other people think and it means sometimes you need to get out of your comfort zone
Answer:
In this scenario the activity director did not take into account that these are younger children who wanna have fun for one and May not be physically able to for two with them them being younger and still having baby fat something like this may or could be rather difficult. He can not say all children should do if because all children are nog the same