I need help with this 9th grade biology question

Use the drop-down menu to complete the statement. an electron in the first energy level of the electron cloud has an electron in the third energy level.a. a lower energy thanb. a higher energy thanc. the same energy as

What type of plant is good for a bioassay and where can i buy it? i only have a month.

How does this procedure serve as a method of birth control?