Answer:
The scientist received high marks for his brilliance and his humour.
Step-by-step explanation:
Faulty parallelism is an error in the structure of a sentence characterized by two parts of the sentence having different structures.
In spoken communication it can be easily heard, and although the intended meaning of the sentence can be understood, it usually confuses the listener and gives the impression of an uneducated speaker.
However, it can easily be corrected by rewriting sentence using only one structure for both parts. This particular sentence could be rewritten as:
1) The scientist received high marks for his brilliance and his humour.
or
2) The scientist received high marks because he was brilliant and because he was humorous.