Why are very high temperatures and pressures required for fusion to occur?

B)to overcome the repulsion between the protons in the nuclei that join  

Fusion is basically the fusion of two hydrogen atoms. Now the nucleus of the hydrogen has protons. The protons are positively charged. When you bring two protons together, what happens? They will repel. To overcome this repusion high temperature is needed. Also the atoms of the hydrogen have to be close to each other to effectively fuse.

Explanation:A, C and D all relate to fission, not fusion.

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B.) to overcome the repulsion between the protons in the nuclei that join

Please give brainliest!! Hope this helps

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

: )

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.