Although I am not 100% (i am not the best for geography), It must be D. Hope this helps your grade! :3
The medulla oblongata detects the levels of oxygen and carbon dioxide concentrations and signals the muscles in the heart, the lungs and diaphragm to increase or decrease thebreathing. The pons controls the speed of inhalation and exhalation orrespiration rate depending on the need of the body.
The race cares produce waste answer by
1. polluting the environment
2.by emitting waste that led to human health problems
The race cares generate waste which led to pollution of environment. The use of motor oil, brake fluid and leaded gasoline led to production of toxic chemicals These chemical have been shown to cause cancer, birth defect and kidney problems.
<span>Cancerous tumors are divided into broad groups on the basis of the particular type of tissue from which the tumor cells arise. this is called histogenesis.
</span><span>Tumors are of different types, some are cancerous and some are benign (non-cancerous). In a disease of cancer, there is an abnormal cell growth. It is characterized as out of control cell growth.</span>
