a. A solid fuel mixes with an adequate amount of liquid fuel to be able to sustain an open burning flame.
b. A gaseous fuel mixes with an adequate amount of oxygen and heats to ignition temperature.
c. A solid fuel encounters an open flame and entrains enough air to ignite.
d. A gaseous fuel encounters an external heat source and experiences piloted ignition.
The option that is correct as regards flaming combustion from the question is A solid fuel mixes with an adequate amount of liquid fuel to be able to sustain an open burning flame.
Therefore, option A is correct.
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Answer is A(Soild Fuil
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B. casual, third-person, entertaining writing.
C. thoughtful, analytical, academic writing.
D. bullet-pointed, technical, factual writing.