What is the difference between an external force and an internal force?

Any french speakers? i need some . could someone check the grammar of my french translations? 1. i would get a card for a bookstore. > > > *je voudrais acheter une carte-cadeau pour la librairie en le centre commercial.*2. they would have to go to the bookstore, the jewelry store, and flower shop. > > > ils devraient aller à la librairie, la bijouterie et le fleuriste.3. a good amount to spend would have to be a few hundred dollars. > > > un bon montant à devrait être de quelques centaines de dollars.4. i decide what present i am going to get for a person by thinking about what would be important to them. > > > je décide quel cadeau je vais chercher pour une personne (by thinking about) ce que cela important pour leur. for the 4th question, how would i say "by thinking about" in french? and by the way, i need the french sentences checked, those are what i wrote.

Translate to french: hi émilie! right now i am at the zoo. there are lots of animals here. in one part of the zoo, there are brown bears. they seem very tired. next, i see a tiger! there are two tigers, and they are both running. over here, there are elephants. the baby one is cute. in this building, they have snakes. some snakes are green, some are black, but they are all long. there are also frogs here. they can jump very high! goodbye émilie!

Ineed with this fast! and if possible, can somone show me how to use the words "meilleur vs. mieux"? these are french questions! fill in the blank with the word that best completes the sentence. les fraises sont que les haricots verts (green beans). - mieux - meilleur - meilleures - meilleurs decide if the following statement is grammatically correct or incorrect. il est mon mieux ami. correct incorrect decide if the following statement is contextually correct or incorrect. l'ours vole. correct incorrect fill in the blank with the word that best completes the sentence. henri joue aux échecs que son frère. - meilleur - meilleure - meilleurs - mieux decide if the following statement is grammatically correct or incorrect. mon frère, c'est le meilleur! correct incorrect fill in the blank with the word that best completes the sentence. béatrice est étudiante. - le meilleur - meilleur - meilleure - la meilleure decide if the following statement is grammatically correct or incorrect. madame dupond fait de meilleurs gâteaux au chocalat que madame duchamps. correct incorrect decide if the following statement is grammatically correct or incorrect. maman cuisine (cooks) mieux que papa. correct incorrect decide if the following statement is grammatically correct or incorrect. paul joue au tennis mieux que marie. correct incorrect decide if the following statement is grammatically correct or incorrect. le lait est meilleur que le café. correct incorrect