Fill the blanks given below:1).............I don’t have a brain .(yes,no)

jellyfish or various small insects.
If you want a deeper answer, it depends on what you call a brain
because a jellyfish has a nerve cluster which is technically a giant brain
and the insects without brains have what we call: ganglia
it is basically a brain just with no ability to think abstractly;
it just controls basic functions and instincts.