Yeast has many commercial uses in the production of

breads
fuels
sodas
wine

Breads, Fuels and wine

Explanation:

Yeasts are basically fungi. They are eukaryotic single-celled organisms and are classified as members of fungus kingdom. It is one the leavening agents in baking. There are many species of yeast. Saccharomyces cerevisiae, is the most common yeast known in the brewing and baking industry. It is a part of healthy mix of bacteria in our gut and can help in absorbing minerals and vitamins from the food. It can even fight disease.

the answer is b

explanation:

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.