To figure out your initual focus on whatever your writing
Answer: Cell wall and cell membrane
Explanation: The cell wall and cell membrane protects the cell the cell wall gives it it's shape and the membrane controls what enters or exits the cell
I think it's best if you read it again so I can make sense.
Answer:
In the case of tea, its pronunciation consists of a short "e", pronounced as how the vowel "e" is called, whereas the letter "a" is not taken into account - this letter is not pronounced, it is simply used to determine the correct pronunciation of the whole word. This pronunciation applies as long as the compound ea is not followed by any letter.