What are all living things composed of only one cell one or more cells at least a hundred cells at least a trillion cells

I would say one or more cells.

Explanation:

Unicellular organisms like bacteria contain one cell.

A multicellular organism, like us humans, contain many cells.

Therefore, all other options can be ruled out as living things can have one cell, or many cells.

the transfer of energy between two molecules spaced just nanometers apart plays a key role in many technologies, including photovoltaics, quantum information systems, lighting, and sensors, as well as in biophysics to measure nanometer distances and in photosynthesis. but an open question in this area is what effect, if any, the surrounding photonic environment has on this nanoscale energy transfer. by designing and performing a carefully controlled experiment to answer this question, scientists have settled the debate and found clues to improving the efficiency of many of the technologies that rely on this process.

explanation: