I’m pretty Sure it’s A sorry if i’m wrong
Answer:
I would say that the answer is A, or releasing ladybugs into a habitat.
Explanation:
This is the only "natural" way to control an aphid population. However, please note that as well as ladybugs, praying mantis's also eat aphids. But, the answer choice doesn't describe the option very well, so that is why I say that it is A.
<em>Hope it helps!</em>
Typically it'd be called spawning or in some cases it could be called "roe".
So either "spawn" or "roe".