A specieces that impacts the survival rates of another species in an ecosystem is known as a
niches species
b
extinct species
c
endangered species
d
keystone species

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

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.