Can nouns be singular, plurar, or possessive

Which statement below accurately describes the carrying capacity of any ecosystem? a. it is not affected by any abiotic or biotic resources. b. it does not affect the species of an ecosystem. c. it is completely dependent upon the food supply. d. it is affected by both abiotic and biotic resources

For 50 pointssome molecules can be oxidized in the cells of animals. this oxidation releases energy for the animal to use. from what source do the cells get these molecules? a. sunlight b. water c. air d. food

The homestead act made it possible for millions of people to achieve the dream of acquiring immense wealth. owning a farm. living in a brick house. moving to a big city.