Human geography (why four pairs? Two are wrong? )

In this case, let's look at the options first.

First, it can be seen from the figure that the natural growth rate has declined as a whole, because the number of natural growth people is decreasing, even negative.

Second, it is wrong to reduce the fluctuation of the total population, because from 1970 to 1995, although the number of people who naturally increase has decreased, it is still positive, that is to say, the population is still increasing every year, so the total population cannot be said to have a downward trend during this period, but the population growth is less.

Third, in the figure, negative numbers only appear when 1995 starts to grow naturally, so 1990 does not start to grow negatively.

Fourth, the increase in the number of immigrants can really promote the growth of the total population. Because even though the natural growth rate of this country is negative and the population is decreasing, immigrants have indeed increased the population of this country. And look at the picture, although there was a negative growth later, the number of immigrants offset this reduced population, which is conducive to the increase of the total population.