Wind, solar and geothermal power are called renewable energy sources because a. tax breaks for these sources are renewed every year b. they are continuously replenished c. humans can replenish these sources periodically d. they produce few toxic byproducts

The right option is; b. they are continuously replenished

Wind, solar and geothermal power are called renewable energy sources because they are continuously replenished.  

Renewable energy sources are energy sources that are naturally continuously being replenished. Renewable energy sources include wind, tides, solar, rain, water and geothermal heat and they provide energy in important sectors such as; air and water cooling or heating, electricity production, transportation, and rural energy services.

they are continuously replenished  so B.

sex cells are usually half's then they find another half and make a fertilize egg

what are the options? add them, then i will be glad to .