I think the answers correct because, A says that the food chain will stay the same, but thats not true because, the frog ate most of the insects. And B says the population will decrease, but that doesn't make sense because a animal that eats grasshoppers would no longer be there. And C says that the population will increase and i think that correct because, one animal that does eat the grasshopper wouldn't be there so the grasshoppers will increase in population. And D says the population of snacks will increase but that was one of the foods the snacks ate so they would decrease because they lost one species to eat off of.
2 hydrogen and 2 chlorine on the reactant side(left of the arrow) There is only 1 H and 1Cl on the products side so the balanced equation would be; H2 + Cl2 —> 2 HCl
