what does the below rebus means?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

I am a word that begins with the letter “i.” If you add the letter “a” to me, I become a new word with a different meaning, but that sounds exactly the same. What word am I?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

Spot 5 differences in two Christmas tree below:

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Solve the rebus riddle in the picture below.

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?