Select from:
(1). solid, liquid, gas
(2). gastropod shells
(3). fur and fat
(4). Steroid hormones
(5). an object
(6). Veins and arteries.
(7). bioaerosols
(8). Most plants
Given those answer options, answer the question: You are presented with the quiz "What is made of diverse hydrophobic molecules? " But you don't know the answer, so you turn to your teacher to ask for hints. He says that "steroid hormones are made of lipids, such as phospholipids and cholesterol" and "lipids Lipids are diverse hydrophobic molecules". So, what's the best answer to the question?
A:
(4).