I would say using a comma to combine the two sentences.
1. casual 2. casual 3. casual 4. casual 5. casu
Answer:
For Q.1: B - For Q.2: B. - For Q.3: C
Explanation:
The primary problem is the greenhouse effect. Greenhouse effect is when some gases (including CO2) absorbs some portion of sun's heat to make the atmosphere warm to support life. But when the amount of CO2 etc. increases in the atmosphere, it heats up more than it is required. So, by limiting CO2 emission, we can solve this problem.
The research suggests we may have little time left to help the big cats of the world.
<em>However</em>
Our progress in all major habitats has been very encouraging.