Carbon fiber is an example of a ( n ) a.) atom

b.) physical properties

c.) extended structure

d.) natural resource

Carbon fiber is an example of an extended structure. That is option C.

Carbon is an element of group 14 in the periodic table with the atomic number of 6.

A carbon fiber is a polymer of carbon that is used to reinforce composite materials.

Carbon fibres are known to be very strong materials that is also very light in weight.

Polymers are structures of an element that is arranged in repeated patterns.

Extended structure are polymers therefore, carbon fiber is an example of an extended structure.

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C extended structure

Explanation:

Carbon fibers or carbon fibres (alternatively CF, graphite fiber or graphite fibre) are fibers about 5 to 10 micrometers (0.00020–0.00039 in) in diameter and composed mostly of carbon atoms. Carbon fibers have several advantages including high stiffness, high tensile strength, low weight, high chemical resistance, high temperature tolerance and low thermal expansion. These properties have made carbon fiber very popular in aerospace, civil engineering, military, and motorsports, along with other competition sports. However, they are relatively expensive when compared with similar fibers, such as glass fibers or plastic fibers.