the first one would be the correct answer
Answer: for the synthesis of protein in the cells of plants
Explanation:
There could be a lot of reasons. To help break down food for the plants, kill off bad and harmful things that might damage the plant.
I like, your question... there might be I looked, for some and found these listings:
Polar Bears International (PBI)
Sodium Chloride (table salt)
While there are probably many different types of salt in all seawater, the type that we see most is just classic table salt (NaCl)