Ascientist finds an unusual object and decides to study it.
which observation indicates that it is a living thing that is multicellular?
a. it can be found in water.
b. it has membrane-bound organelles.
c. it possesses an uneven shape.
d. it is motile.

The best answer is B.

The cells of a multi cellular organisms are called eukaryotic cells and have:

1. a membrane-bound nucleus

2. numerous membrane - bound organelles including the endoplasmic reticulum, Golgi apparatus, chloroplasts and mitochondria.

3. several rod-shaped chromosomes.

Because a eukaryotic cell's nucleus is said to be surrounded by a membrane, it is said to have a true nucleus.  Organelles (meaning "little organ")  have specialized cellular roles just like the organs of  the body have specialized roles.

more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem