Solution:

Person-1

Explanation:
Person-3: Some will say the answer to be person-3 as his body is floating in the water. But the question is do dead bodies float in water?. The answer is yes, but it takes at least 2 to 3 days for a dead body to float. In the starting 1 to 2 days, a dead body sink under the water, thereafter it starts floating. Thus, person-3 is not dead.

Person-2: There is vibration in the water. This makes us sure that person-2 is not dead.

Person-1: If you see closely, he is having a book in his hand and it is in the water. Also, he seems to be in a subconscious state.

So, the answer to this puzzle is Person-1.

Solution:

The number of differences is the same as the number of legs of the spider.

Solution:

The deer hiding in the trees.

Solution:

They are playing basketball with a soccer ball.

Solution:

Rick wasn't at home. He Parked his car after snow built up on the driveway.

Solution:

A

Solution:

1. The Woman in the portrait is missing a shoe.
2. It can't be sunset at 12 PM.
3. The boy with the guitar has different sleeves.

Solution:

The boy who has written answers in his arms.

Solution:

The polar bears live in the north pole and penguins in the south pole.

Solution:

1. Check the list on the tree, It's a list of 6 people.
2. A spider has woven a web near the tent. This means they must have been staying for a few days at least.
3. Two men are having lunch.
The third one is measuring the depth of the river.
The fourth one is fishing.