Question

1. pollution : health effects ::

a. industrial : revolution
b. cyanide : smog
c. extinction : biodiversity
d. automobiles : exhaust

Explanation:

• The relationship between "pollution" and "health effects" is that pollution (a phenomenon) has an impact on health (a related aspect).
• For option c, "extinction" (a phenomenon) has an impact on "biodiversity" (a related aspect), which is a similar relationship.
• Option a: "industrial" is an adjective, not a phenomenon - related relationship like the given pair.
• Option b: "cyanide" and "smog" are both pollutants, not a cause - effect - like relationship.
• Option d: "automobiles" produce "exhaust", which is a producer - product relationship, not the same as the given pair's relationship.

Answer:

c. extinction : biodiversity