1 reason is to kill disease in water
Answer:
Renewable Energy Resources.
Explanation:
Unlike fossil fuels which cannot be recovered when destroyed, these sources of energy can be recovered by a means of recycling . Recycling here reduces solid wastes which is one of the causes of land pollution.
Hydroelectric schemes can only be built in mountain regions where rainfall and rivers are plentiful which involves upset of aquatic ecosystem. This poses a dangerous pollution problem though.
Wind generators and solar panels are not very efficient energy producers. However, future schemes for producing solar energy via solar satellites are promising.
your anwer is c) The two types of wings share a common function (and therefore are both called ... the bird wing and insect wing did not arise from an original ancestral structure ... When the gill slits became supported by cartilaginous elements, the first set of
