Q: Fact 1: Fungi have special structures for penetrating a host. Fact 2: Host specificity was also observed for some fungi and tree species. Given the two facts above, what have special structures for penetrating trees?

Select from the following.
[1]. Fungi;
[2]. flowers roots;
[3]. rain;
[4]. fungus;
[5]. LEDs;
[6]. grasshoppers;
[7]. ferns;
[8]. bamboo;
The answer is:
[1].