Answer:
c. Supernatural.
c. Having an unpleasant smell.
a. To change something.
Explanation:
In the first question, the word "paranormal activities" refers to an activity or event that is beyond the understanding and capability of normal science. Thus, this word's most likely meaning is "supernatural".
Secondly, the prefix 'mal-' is used to generally refer to something that is bad, wrong, or evil. So, putting that into consideration, and the meaning of the suffix '-ous' the word "malodorous' would mean something that has an unpleasant smell.
Thirdly, the word "alter" means 'to change, to be different from' etc. So, the correct answer will be option A.
Thus, the correct answers are options c, c, and a.