The days are getting shorter and colder. these trees are responding to the change. their leaves change color and will soon fall off. losing leaves during the winter is the response to the external environment called
a) dormancy.
b) hibernation.
c) hydrotropism.
d) phototropism.

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.

nb

explanation:

kj

b. climate change will cause an increase in biodiversity of all ecosystems.

hope this