Question

study the following analogy: which of the following best completes the analogy? forest / trees / biosphere coal burning/ classical smog / vehicular emissions pollution/ smoke / water pollution biodegradable /phosphate / non - biodegradable

Explanation:

Photochemical smog is a type of air - pollution formed by vehicular emissions. Classical smog is formed by coal - burning. Just as vehicular emissions are related to photochemical smog, coal - burning is related to classical smog. In the other options, the relationships do not match the cause - effect relationship of the given analogy.

Answer:

Coal burning/ Classical smog / Vehicular emissions