What has one letter and starts with an E?

A candy is hiding in plain sight among the gift boxes in this picture. Can you spot it? Test your visual skills now!

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.