FOUR RHYMING RIDDLES

1)

I always thirst, but never hunger;

I wear a broad hat in the summer.

But when the cold winds blow, my head is bare,

My hat no match for winter's air.

2)

An unwelcome guest, I'm just out of sight,

Though you push me away, I ever cling tight:

Carried by nearly all, you can't leave me behind,

Until I am paid, I weigh on your mind.

3)

As large as a mountain or as small as a pea,

Endlessly swimming in a waterless sea.

4)

A giant ship that sailed the earth,

Which never saw a port;

Add one letter to it,

To make a covering of a sort.

Replace the final letter

To gain a place that beasts might bed;

Reverse the middle, insert an "I,"

To find what's in you head.

Answers:

1. A tree

2. Debt

3. An asteroid

4. Ark/bark/barn/brain