Darwin realized that Malthus’ ideas about human population growth applied even more to other organisms, such as .

a
insect populations grow unchecked each year.
b
cockroaches produce millions of eggs but only a few survive.
c
tigers are overpopulating the earth.
d
mammals carefully raise one or two young per year.

Darwin realized that Malthus’ ideas about human population growth applied even more to other organisms, such as( b  )cockroaches produce millions of eggs but only a few survive.

Explanation:

In his scientific theory of Biological evolution Drawin explained the evolution of organism through a common ancestor

The main theme of Malthus' work was that the growth in   population will always be higher than the food available which will further lead to hunger,disease and struggle for survival.Thomas Malthus' work helped Darwin to refine his theory on natural selection by stating a reason for meaningful competition between members of the same species(i.e survival of the fittest)

So the answer is Darwin realized that Malthus’ ideas about human population growth applied even more to other organisms, such as( b  )cockroaches produce millions of eggs but only a few survive.

the awnser is d i think