Which of the following are the 3 factors of sustainability?
recycling
solar energy
nutrient cycling
biodiversity

Solar Energy and Biodiversity are the 3 factors of Sustainability.

B. Solar energy

D. Biodiversity

Explanation:

Sustainable sources of energy are renewable sources of energy. Sustainable energy is the availability of energy to such an extent that it addresses the issues of the present without trading off the capacity of future ages to address their issues.

Sustainable energy incorporates all sustainable energy sources, for instance, hydroelectricity (electricity from water), biomass, geothermal (electricity from the Earth), wind (using windmill), wave, tidal and sun oriented energies. Renewable energy is the process but sustainable energy is our belief or mindset.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!