It can be both, because the definition of blithe is “showing a casual and cheerful indifference considered to be callous or improper.” And that is negative, but the other definition is “happy or joyous.” Which is positive.
Answer:mouthful, teaspoonful
Explanation:
Celestial - Relating to the sky
Sagacity- The capacity to reason, judge, and act intelligently
Conjecture - To form an opinion without strong evidence
Interpose - To come between two things, to interrupt
The subject would be that marcy likes goldfish, therefore, the goldfish is a noun