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Answer:
globe - plane
inside of a spoon - concave
outside of a spoon- convex
inverted bowl- convex
pls check 1, 2, 3, 4
hope it helps u..
Explanation:
globe i think is obviously plain because no object cannot be seen.
while inside and outside of a spoon is concave and convex because it has a bulging and inner surface.
while inverted bowl is always convex as it is bulging.
best of luck...