B because a new species adds more diversity to your ecosystem
Answer:
Explanation:
can be observed and measured without changing composition (just say comp.), are used to observe and describe
<h2>
It may become endangered </h2>
Explanation: <u><em>If organisms cannot adapt to the changes in their ecosystem, they may move to another location. If they will not move, the species may become threatened, endangered, or extinct. Under an evolutionary phenomenon called relaxed selection, traits that were advantageous in one time and place become obsolete in another. Traits that aren't actively maintained by natural selection tend to become smaller or less functional over time, studies suggest.</em></u>
It is the motile because it is what cause the movement of cells over surfaces without the aid of flagella
