Concept:
Adipose tissue is not only a storage site for fat but also functions as an endocrine organ. It secretes several hormones and signaling molecules known as adipokines.
One important peptide hormone secreted by adipose tissue is leptin, which helps regulate appetite, body weight, and energy balance.
Step 1: Understand the hormonal role of adipose tissue.
Adipose tissue releases hormones that communicate with the brain regarding energy storage and hunger levels.
Step 2: Identify the peptide hormone produced.
The peptide hormone secreted by adipose tissue is:
\[
\text{Leptin}
\]
Hence, the correct answer is:
\[
\boxed{(B)\ \text{Leptin}}
\]