Select from the following.
(a). bees;
(b). plants;
(c). water;
(d). health;
(e). firs;
(f). survival;
(g). food;
(h). movement;
Q: Fact 1: Earthworm burrows help aerate soil, which is also good for plants. Fact 2: Earthworms crawl through the soil, eating sediments or dirt directly. Given the two facts above, earthworms eat dirt, which is good for what?
A:
(b).