Answer the following question given this paragraph: 

Some echinoderms can reproduce asexually by fission, but most echinoderms reproduce sexually. They generally have separate sexes and external fertilization. Eggs hatch into free-swimming larvae. The larvae undergo metamorphosis to change into the adult form. During metamorphosis, their bilateral symmetry changes to radial symmetry.


Q: How do most echinoderms reproduce?

 Choices:

- asexually

- flowering

- grafting

- sexually

A:
sexually
