Taking a bike ride instead of a car ride is practicing which save fuel for the future.
a. recycling
b. conservation
c. efficiency
d. capacity
e. fans
f. monsters
g. insulation
h. fission

The correct answer is option B. "Conservation".

Explanation:

Energy conservation is the ecological practice of reducing the consumption of energy by reducing the use of a service that involves energy consumption. In this example the person is reducing the consumption of chemical energy by taking a bike ride instead of a car ride, therefore he or she is practicing energy conservation. This practice helps to conserve the chemical energy contained in the fuel, and helps to save it for the future.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.