Identify and describe the type of symbiotic relationship between Dutch elm and the elm tree, and explain the effect of this interaction on each species involved.
a) Mutualism - Dutch elm disease harms the elm tree, but the elm tree provides nutrients to the Dutch elm.
b) Parasitism - Dutch elm disease benefits from the elm tree's resources, while harming the elm tree.
c) Commensalism - Dutch elm disease neither benefits nor harms the elm tree, while the elm tree provides a habitat for the disease.
d) Amensalism - Dutch elm disease harms the elm tree, but the elm tree is unaffected by the disease.