pick from the following.
[1]. insects
[2]. parasites
[3]. bushes
[4]. nematodes
[5]. trees
[6]. bacteria
[7]. animals
[8]. Most plants
Given those answer options, answer the question: Fact 1: Roundworms may be free-living or parasitic. Fact 2: Nematodes are microscopic roundworms. Given the two facts above, what may be free-living or parasitic?
A:
[4].