volume of water in the xylem flow of necessary nutrients response to environmental factors rate of photosynthesis in leaves
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: When a tree suffers from a decreased ability to transport materials within the phloem, what is directly impacted?
Possibilities:
- volume of water in the xylem
- flow of necessary nutrients
- response to environmental factors
- rate of photosynthesis in leaves

flow of necessary nutrients