An example of an organism is the human heart
the petals of a rose
a colony of ants
an oak tree

It's obviously not A.

an oak tree

Explanation:

All the other options are either parts of an organism ( rose petal and human heart) or, multiple organisms ( a colony of ants) but, an oak tree is one single living organism.

plant because they survive by water, sunlight, ex.

explanation:

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).