The movement of earth's tectonic plates is related to a. cycles of sunspots. b. movements of materials in the mantle. c. phases of the earth's moon. d. seasonal changes in weather systems.

B. The movements of materials in the mantle.

[content deleted] - user123802726recklesschicken

a

explanation:

many plants naturally reproduce this way, but it can also be induced artificially. horticulturalists have developed asexual propagation techniques that use vegetative plant parts to replicate plants. success rates and difficulty of propagation vary greatly. monocotyledons typically lack a vascular cambium and therefore are harder to propagate.