'Swift' is a synonym that fits the series of words describing speed.

The word 'elated' fits the series of positive emotions.

'Massive' is a synonym that fits the series of words describing size.

'Petite' fits the series of words describing small size.

'Carrot' is a vegetable, while the others are fruits.

'Benevolent' means kind and well-meaning, making 'kind' the correct synonym.

'Fast' is a synonym for 'quick', while the others are antonyms or unrelated.

'Scarce' is the antonym of 'Abundant', meaning in short supply.

'Selfish' is the opposite of 'generous', meaning lacking consideration for others.

'Pessimistic' is the antonym of 'Optimistic', meaning having a negative outlook.

In classical elements, 'Fire, Water, Air' is a common sequence.

'Slow' is the opposite of 'fast', just as 'cold' is the opposite of 'hot'.

The opposite of 'happy' is 'sad'.

The complete idiom is 'Bite the hand that feeds you'.

'Kick the bucket' is an idiom that means to die.

The idiom 'the die is cast' means that a decision has been made and cannot be changed.

The idiom is 'caught between a rock and a hard place.'

'To throw in the towel' means to give up.

The logical sequence of days of the week is 'Monday, Tuesday, Wednesday'.

This is the Fibonacci series where each number is the sum of the two preceding ones: 3+5=8.

The series doubles each time: 2x2=4, 4x2=8, 8x2=16, so 16x2=32.

The series skips one letter each time: A (B) C (D) E (F) G (H) I.

Fast and quick are synonyms, and slow and leisurely are synonyms.

The complete idiom is 'Actions speak louder than words.'

The complete idiom is 'The early bird catches the worm.'

'Car' is not an animal, while the others are pets.

'Tree' is not a flower, while the others are types of flowers.

'Call the shots' means to make decisions or take charge.

'Eager' is the correct choice as it indicates a strong desire to finish the project.

'Exhausted' is the correct choice as it indicates fatigue after a long meeting.