The correct answer is C.commensalism; parasitism
At first it is a commensalism relationship which becomes parasitic when the living cells get attacked.
Hormones is the term you are looking for, but I may be wrong
It's kept on the ground before it hatches
Their health , medical conditions, diseases
In this scenario,I guess the answer is roughly around 300 children die every year from the diseases in which the vaccinations are available. Hope this is the correct answer then and would surely be of big help to you then.
