Aunique feature of muscle tissue is that it is capable of

Contraction.

Explanation:

Muscle tissues are defined as they are elastic and extensible in nature. In other words it's also defined as they are able to stretched and returned to its original size and shapes. A unique feature of muscle tissue is they are able of contractile in nature. With the help of this contraction they are able to sliding myosin and actin filaments which are present in muscles tissues.

Basically muscle tissues are three types:

1) Skeletal muscle: They are strong and rapid in contraction.

2) Cardiac muscle: They are strong in contraction.

3) Smooth muscle tissues: They are slow and weak in contraction.

complete the square on the right side of the equation;

-5(x + 0)^2 + 15

answer: d. y = -x^2 + 15