Question

what does the word sustainable mean as it is used in paragraph 1 of the passage?
fit to eat
alive or present
can be maintained
enough to share
reading passage
overfishing
1 the world faces a calamitous food crisis if we do not stop overfishing. according to the united nations, about one billion people, mostly in developing countries, rely on fish as their primary source of animal protein. what will they do when the fish run out? that crisis could occur soon. while there will probably never be a time when we do not have fish, there could come a time when we no longer have enough fish. the cause of this fish shortage is overfishing. overfishing occurs \when more fish are caught than the population can replace through natural reproduction,\ according to the world wildlife foundation. once this occurs, the species is no longer \sustainable.\

Explanation:

The passage discusses overfishing and how when more fish are caught than the population can replace through natural reproduction, the species is no longer "sustainable". The key context is about maintaining a population. "Fit to eat" is about edibility, "alive or present" is too basic without the maintenance aspect, and "enough to share" doesn't relate to the reproduction - replacement context. "Can be maintained" aligns with the idea of a population being able to continue (maintained) through natural reproduction.

Answer:

can be maintained