A. cells because, cells<span> are the most basic building units of life, all living things are composed of </span>cells<span>, and new </span>cells<span> are made from pre-existing </span>cells<span>, which divide into two. A structural or functional unit in a </span>cell<span> that is constructed from several macromolecules bonded together.
Hope this helps you in your question friend !!!^_~!!!</span>
Rather than helping one species you can help a entire ecosystem. if you think about it, you would be saving more in a ecosystem then you would in just 1 single species
