Explain why a spark from a firework will not hurt you as much as a cup of hot tea?

It will not unless it contains as much energy as the cup of tea. So a tiny spark may be at 1,000 Celsius  but a whole cup of tea at 90 Celsius  will deliver far more heat (energy) to the skin as the spark.

its the cell wall and the they are unique to plant

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.