Good job! The sentence is correct:
The tiger is a big wild cat with striped fur.
Here is why it is correct, step by step:
- The tiger = the subject (who we are talking about).
- is = the verb (the word that tells what the tiger is).
- a big wild cat = the name for the tiger. We usually put describing words (adjectives) before the noun: size (big) then type (wild).
- with striped fur = extra information that tells us what the tiger has. The word "with" shows possession or a feature.
Another correct way to say it when talking about all tigers is:
Tigers are big wild cats with striped fur.
Use "The tiger" for one tiger and "Tigers" when you mean all tigers. Try reading the sentence out loud — it sounds clear and correct.