The correct option is
C Fats provide the body with energy to drive activity.
In a sentence in active voice, the order of the words is as follows: The subject followed by the verb, which is followed by the object.The subject of a sentence should be a noun/ noun phrase. Among the given words, the nouns are: 'Fats' and 'body'. The verb is 'provide'. We know that when the noun is plural, the verb does not contain the letter 's'. 'Fats' is a plural noun. Hence, the subject (doer of the action) is 'fats'. Hence, the subject of the sentence is: 'Fats' and the sentence begins with this word. Among the given options, C and D are incorrect as they do not begin with the word, 'Fats'.
Both the options A and B start with the phrase, 'Fats provide the body'. When we ask the question, 'What do they provide the body with?'; The answer is 'with energy'. Hence, this phrase has to be followed by the words, 'with energy'. Why is energy required? The answer is provided by the phrase, 'to drive activity'. Hence, the sequence: 'Fats provide the body with energy to drive activity' forms a meaningful sentence. Option B is correct.
Option A is incorrect as 'Fats provide with the body to drive energy activity' does not convey any meaning. Hence, this is incorrect.