How to do it i don’t understand this

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

The spermists believed that: the male made the only hereditary contribution to the offspring the male and female traits were blended in the offspring the female made the only hereditary contribution to the offspring the male and the female made equal contributions to the next generation

What class of levers is shown in this image?