What's the difference between 食事します and 食べます? Thank you

~がいちばん~ Examples on my book are : 1。弟がいちばん背が高いです 2。2月がいちばん寒いです On number 1, I am still don't know why after いちばん there is 背が before 高い。 What is the meaning of 背がin that sentence？ while on number 2 just いちばん寒い。 Thank you for your help

Difference of が/に あります/います I would like to know the difference between が います/あります and にあります/います。 I still don't get it to distinguish between it. Examples on my book like : 1。駅の近くにポストがあります 2。花屋と本屋と美術館の間にあります。 Would you mind to explain the difference between it? Thank you

Difference of どこにいますか and どこですか What is the difference どこにいますか and どこですか? Well I know that it is for asking "where is something like place, etc". But I don't really kniw the difference between of it. Thank you

Particle 私は誕生日「に」父「に」時計「を」もらいました Is it correct? I am confused whether its 誕生日「に」 or 誕生日「の」。 Thanks so much

国で「x」に日本語を習いましたか 国で「x」に日本語を習いましたか。 日本人の先生習いました。 I know the meaning of every word in that sentences. But, I am confused what should I fill the blank. Is it the correct one if I fill the blank with どなた/だれ?

Is this correct? カリナさはとても上手な絵を書きます。 I want to say that Karina is good at drawing a picture. Is it the correct sentence? Thanks so much