The advantage of asexual reproduction in plants is primarily conservation of energy and the ability to reproduce without the need for a mate (option one). Asexual reproduction allows a plant to produce offspring that are genetically identical to itself (clones) without needing to find a partner or expend energy on processes related to sexual reproduction, such as pollination and fertilization.
However, it's worth noting that while asexual reproduction is efficient and requires less energy, it does not contribute to increased genetic diversity, which is more characteristic of sexual reproduction (option two). Increased genetic diversity is generally seen as an advantage of sexual reproduction, as it allows populations to better adapt to changing environments.
So, the correct answer reflecting the advantage of asexual reproduction would be conservation of energy and reproduction without another parent.