Final answer:
The efficiency of plant reproduction is increased by seeds.
Step-by-step explanation:
The subject of this question is Biology. The question is asking about the factor that increased the efficiency of plant reproduction. The correct answer is Seeds.
Seeds are a crucial development in plant reproduction as they protect and nourish the embryonic plant. Compared to spores, seeds have a higher chance of survival and dispersal, promoting efficient reproduction and the survival of plant species. Seeds also provide a means for plants to colonize new areas and adapt to different environments.
In contrast, spores are the primary means of reproduction in non-vascular plants like mosses and ferns. While spores can be dispersed by wind or water, they have a lower chance of survival and are less efficient in promoting successful reproduction.
Learn more about Plant reproduction