which organism can reproduce both sexually and asexually

a. starfish \
b. protist
c, dog
d. sandhill crane

The correct option is b. protist.

The organism that can reproduce both sexually and asexually is b. protist.

The organism that can reproduce both sexually and asexually is the protist. To determine this, we can analyze the characteristics and reproduction methods of each organism mentioned.

a. Starfish: Starfish reproduce sexually through external fertilization. Male and female individuals release sperm and eggs into the water, where fertilization occurs. However, they do not reproduce asexually.

b. Protist: Many protists can reproduce both sexually and asexually. Some protists reproduce asexually through methods such as binary fission (splitting into two), budding (small outgrowths that develop into new individuals), or fragmentation (breaking into pieces that can grow into new individuals). Additionally, certain protists reproduce sexually through processes like conjugation or the formation of gametes.

c. Dog: Dogs reproduce exclusively sexually, meaning they require a male and a female to mate and produce offspring. They do not have the ability to reproduce asexually.

d. Sandhill crane: Sandhill cranes are birds and reproduce solely thual reproduction. They also do not possess the capability for asexual reproduction.

Therefore, the correct answer is b. protist.