Answer: first line of defense
Explanation:
<span>The categories of student disabilities are known as Low-incidence and High-Incidence. ... examples of LI disabilities include sensory impairments such as blind/ low vision and ... attention deficit hyperactivity disorder (ADHD), speech and language issues, emotional/behavioral disturbances, mildintellectual disability, and ...</span><span>
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The correct answer is A (Automobiles).
Particulate matter is a complex mixture of extremely small particles and liquid droplets.
One of the major components of particulate matter is sulphate usually coming from sulphur dioxide found in exhaust fumes that have been produced by automobiles . Other components are nitrates , ammonia, sodium chloride and black carbon.
Other components of particulate matter come from dust, soot, smoke, industrial emissions.
Particulate matter is one of the most common contributor to air pollution.
