How do plants use nuclear fission to generate electricity?
a. fission creates new elements from which electricity can be generated.
b. fission releases energy in the form of electricity.
c. fission breaks down radioactive materials into electrically charged materials.
d. fission produces heat, which is used to produce steam to power generators.

Ascientist wants to know how individual lions within a pride interact with each other in their own environment. to do this, the scientist sedates and tags all of the lions within a pride. then, he places several remotely-controlled video cameras near the lions' den and performs an observational field study. he collects continuous video footage over the span of one year, analyzes the video, and then forms conclusions based on his observations.