Answer:
a pH meter is the correct answer
Explanation:
i just did the test
In English please so I can help you with your problem
Ecosystems need producers because they are the start of the food chain.
Producers are consumed by first consumers, the second consumers and so on.
Just as animals, plants also contain vascular<span> tissues (</span>xylem<span>), which transports water and minerals up from the roots to the leaves, and </span>phloem<span>, which transports sugar molecules, amino acids, and hormones both up and down through the plant</span>
