Both sentences are grammatically correct. Here is a simple, step-by-step explanation for a 7-year-old.
- Sentence 1: The jungle is so thick that very little sunlight reaches the ground. Orchids grow on tree trunks to get more sunshine.
Explanation: The first part tells us the problem (the jungle is thick and the ground is dark). The second sentence tells us the answer (orchids climb trees to catch more light). 'So...that' and 'to get' are correct ways to show cause and purpose. - Sentence 2: Because the jungle is thick and dark, orchids grow on tree trunks to get more sunlight.
Explanation: This is one sentence that starts with because. When a sentence starts with a 'because' clause, put a comma after that clause. This sentence correctly uses the comma. 'Because' means 'for this reason'.
Small improvement suggestion: use the same word for light in both sentences. 'Sunlight' and 'sunshine' both work, but it's clearer to use one word. For example:
- The jungle is so thick that very little sunlight reaches the ground. Orchids grow on tree trunks to get more sunlight.
- Because the jungle is thick and dark, orchids grow on tree trunks to get more sunlight.
Short note for you: 'Because' makes a reason, and when it starts a sentence, put a comma after the reason part. Great job — your sentences are clear and correct!