An alkaline earth metal is more reactive than an alkali metal. *

an alkaline

Explanation:

when valence electrons are farther from the nucleus, they are attracted less strongly by the nucleus an more easily remove from the atom .this makes the atom more reactive .this make alkaline metal with their two valence electron less reactive than alkali metal with their one valence electron

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.