Reasons why packets of protein collected in a vacuole might merge with lysosomes

Lysosome contains many hydrolytic enzymes that helps in the breakdown of many types of biomolecules.

Development of lysosome requires many components like lysosomal membrane proteins, hydrolases, etc which comes from endoplasmic reticulum, Golgi apparatus and plasma membrane in the form of vesicles.

So packets of protein collected in a vacuole might merge with lysosome to make its membrane. Some proteins called lysosome-associated membrane protein forms a protective covering inside the membrane called glycocalyx which protects the lysosomal membrane from its hydrolytic enzyme.  

So the packets of protein collected in a vacuole might merge with lysosomes to forms its membrane and helps in the proper functioning of lysosome.

For the first blank it would be a decline in the  lynx's population, because when there is a rise in a population it means there are going to be more of that species, stagnancy is when there is a stagnant smelling pond, bad smelling. for the second blank direct competition for the survival/food, because thats an animals nature, to survive at all costs, while Intraspecific means produced/producing, occurring, or existing within a species or between individuals of a single species of animal, while Apparent means clearly visable/obvious.