(A battery), by definition, (consisting) of a group of two or more primary or secondary battery cells, (which)  (convert) chemical energy into electrical energy.1 poinA. a batteryB. consistingC. whichD. convert

The question seems to be asking for the correct form of the words in parentheses. Here's the step-by-step analysis:

A. "A battery" - This is correct. "A" is used before words that begin with a consonant sound, and "battery" begins with a consonant sound.

B. "consisting" - This is correct. The present participle "consisting" is used to describe the battery.

C. "which" - This is correct. "Which" is a relative pronoun used to introduce a relative clause. It refers back to "a group of two or more primary or secondary battery cells".

D. "convert" - This is incorrect. The correct form should be "converts". The relative pronoun "which" refers to the singular noun "a group", so the verb should also be in the singular form. Therefore, the correct sentence is: "A battery, by definition, consisting of a group of two or more primary or secondary battery cells, which converts chemical energy into electrical energy."