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Can someone please help me with these two science questions?
The relationship in which one species benefits and the other is unharmed is known as what?
-a niche
-commensalism
-mutualism
-parasitism
Population size is limited by all of the following except what?
-biotic factors
-abiotic factors
-competition
-none of the above
Thank you!!!!!!

An organism with a small niche?
An organism that occupies a large niche?
Word that means tending to move toward one point or to approach each other?
Over time the original _ _ becomes an _ and is _ on or down through the _

Science Packet Questions:
Which is a biotic factor that affects the size of a population in a specific ecosystem?
a. average temperature of the ecosystem b. type of soil in the ecosystem
c. number and kinds of predators in the ecosystem d. concentration of oxygen in the ecosystem
During a long period when there is no rainfall, a mountain lion may temporarily leave its usual hunting territory to drink from a farm pond. This behavior is probably due to
a. its need to find different food to eat
b. the change in an abiotic factor in its environment
c. its need to find a new habitat
d. the change in a biotic factor in its environment
An organism’s niche is
a. the range of physical and biological conditions in which an organism lives and the way in which it uses those conditions
b. all the physical and biological factors in the organism’s environment
c. the range of temperature that the organism needs to survive
d. a full description of the place an organism lives
Several species of warblers can live in the same spruce tree ONLY because they
a. have different habitats within the tree
b. eat different foods within the tree
c. occupy different niches within the tree
d. can find different temperatures within the tree
An interaction in which one organism captures and feeds on another organism is called
a. competition b. sybiosis c. mutualism d. predation