Answer:
Genes are segments of DNA that contain the code for a specific protein that functions in one or more types of cells in the body. Chromosomes are structures within cells that contain a person's genes. Genes are contained in chromosomes, which are in the cell nucleus. And a trait is a gene-determined characteristic.
Answer: Animal
Explanation: Us humans are an animal because we don’t make our own food like plants do. We kill and eat other plants and animals.
I believe the answer is Oxygen and Carbon Dioxide. Hope this helps:)