Question

what is the meant by the term 'invisible', 'physically demanding' and 'time consuming'

Answer 1

Invisible is something you cannot see.physically demanding is something that needs more hard work and will require your body to work and move. Time consuming that requires a lot of time

Answer 2

invisible means something whom we are unable to see and physically demanding means something which is demanded by your body and time consuming means something in we are spending our time ... The best ex. is chatting .We are there to hide it and it is demanded by our body and of course it is time consuming