D. — perfect future.
The reasoning being that perfect future is a verb tense that is used when there’s an action that will be completed in the future.
Hope this helps. ^^
The two systems are 1.Shoot system and 2. Root system. In the shoot system, there are stems which are the leaves that are attached., flowers and buds. With the root system, this constantly gives the plant water and food. When a seed is made, the first root is called a radicle. I hope this helped! Any other questions? Feel free to ask me! :)
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