Which of these statements explains a key difference between unicellular and multicellular organisms?. Single choice. Only multicellular organisms can photosynthesize.
The cells of unicellular organisms are much smaller than the cells of multicellular organisms.
multicellular organisms are more complex

Multicellular organisms are more complex.

Explanation:

the fourth amendment protects:

"the right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."  

so this would mean the denial to search and seizure without warrant or permission.