Directions: Four parts of the sentences given below have been underlined. Identify the part having an error. If no part has an error, mark (E).

(A) The light from a firefly is said to be “cold” because the (B) insect's utilization of the energy is so efficient that (C) a little of it (D) is converted into heat. (E) No error

The error is in part (C) "a little of it." The sentence is explaining that firefly light production is very efficient, so very little energy is converted to heat. The correct phrase should be "little of it" (without 'a') to emphasize the small amount. "A little" means some small amount (positive implication), while "little" means hardly any (negative implication). In this context, we want to emphasize how minimal the heat conversion is, so "little" is the appropriate choice.