Which of the following
describes the decay rate for
two different radioactive
isotopes?

https://chem.libretexts.org/Courses/University_of_Missouri/MU%3A__1330H_(Keller)/21%3A_Nuclear_Chemistry/21.4%3A_Rates_of_Radioactive_Decay

Explanation:

here is some info about it

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

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.