How many σ bonds can the two sets of 2p orbitals make with each other?.

the role of the microscope world in creating new materials .

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.

i believe the answer is a.

i'm pretty sure its b i might be wrong though!