All living beings that is found in the nature interacts with each other and with the nature and their surroundings. They are always found in their habitats. Different organism living in the biospheres interacts and adapts with each other and to their environment. Such study of interaction of organisms with their environment is called ecology. These interaction is always between the biotic factors and abiotic factors.
The biological influences of the living organisms when they react with the living part of the surrounding or the environment are called biotic factors. While interaction with the non living parts like soil, sunlight, wind,water, etc are called abiotic factors.
The answer is muscle cells. This is because they are responsible
for either voluntary movement (skeletal muscle) or involuntary movement (smooth muscle). This movement requires energy to
power the movement of the actin and myosin action
that is the core of every muscle. Each myosin has an ATP-binding site.
