True- breeding plants . cannot be cross-fertilized produce sterile offspring when cross-fertilized self-fertilize to produce offspring identical to the parent become sterile after three generations self-fertilize to produce hybrid offspring

Self-fertilize to produce offspring identical to the parent

Explanation:

True-breeding plants are the breeding plants which are homozygous for the trait that is they are homozygous for the dominant trait and for the recessive trait.

This can be confirmed by making a cross between them in which they are self-fertilized. This self-fertilization produces the offsprings identical to the parents with the same phenotype.

For example:

Green pod (dominant trait)- GG

yellow pod (recessive trait)- gg

cross -  GG X gg

                    g     g

           G      Gg   Gg

         G     Gg  Gg

All the offsprings are of green color as all have the Gg genotype in which the dominant allele is G and the recessive

it’s lava came from an explosive eruption

not too sure but maybe in the hot springs.