Umm air, water pressure, I'm giving ideas, that is confusing. They come out in high tide.
I believe the answer is b. glutamate from glucose and ammonia
It’s either A or D, in my opinion I would go for D. Plants were needed to produce carbon dioxide.
EXPLANATION : Plants are really important for the planet and for all living things. Plants absorb carbon dioxide and release oxygen from their leaves, which humans and other animals need to breathe. Living things need plants to live
The answer to your question is Sclerenchyma cells have thick lignified secondary walls. Answer: Sclerenchyma