Darwin’s journey helped us all

To see how species change

He took down notes on what he saw

Life never stays the same!

His map has lines and forks, you see

It looks just like a tree

It all comes down to 1 small thing

What could the connection be?

The connection is the common ancestors.

Explanation:

As shown in the question above, Darwin's work generated a map where the lines and forks created an image similar to a tree.

This "tree" linked species and places studied by Darwin. This connection was established by a common connection to all the species that Darwin studied. This connection was the common ancestor that a set of species shared and that was essential for the evolution of species to be understood.

To see how species change.

Explanation:

Charles Darwin was an English naturalist that was born in 1809. He proposed theory of evolution after he carried out some experiments. He reduced that organisms arise and develop through natural selection which is a variation that help organisms to develop some characteristics which help them to survive and adapt to their environment.

they float because they are less dense than the water itself

something denser than water, like a rock, will sink to the bottom

the answer to your question is b