On a topographic map, the is used to determine the straight line distance between two points.
scale
O elevation profile
compass rose
O legend

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.

i believe it would be c: tons.