If a schoolyard is kept open for public play, what is most likely to happen?

the schoolyard will fall into dangerous disrepair
the community children will be physically active
the local police will have more work to do
the teachers will have to stay on campus all day

The community children will be physically active

Explanation:

If the school yard is kept tight for playing in public, the children of the community will have access to this place and will be able to carry out numerous activities safely in an environment aimed at children.

With these activities, children will be more active and less sedentary, not only because of games, but also through socializing with other children.

                                                        water

a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

                                                        halon  

any of a number of unreactive gaseous compounds of carbon with bromine and other halogens, used in fire extinguishers, but now known to damage the ozone layer.

                                                  dry chemical

extinguishing agent used on class a, class b, and class c fires.

                                                  carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. it is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.