The correct answer is letter c. traps heat.
The Earth's Atmosphere deals with the sunlight it absorbs in the day, absorbing it and spreading it, which heats up the planet, but at night, the sunlight absorbed weakens and the Earth cools up, but due to the greenhouse effect, it traps certain amounts of heat, which results to hotness of the weather. Greenhouse Effect doubles the heat, because it traps heat when heat tries to leave our atmosphere.
Ectopic focus or ectopic pacemaker happens when an excitable group of cells outside the normal sinoatrial node causes premature heartbeat. Sinoatrial node (SA node) is the pacemaker of the heart. Most people experience ectopic focus but persistent occurrence may need the client/patient to visit the doctor. If a client or patient complains of ectopic focus, it is better to consider his/her activity before visiting the clinic. Ask, for example if the client/patient had a vigorous exercise because it might be causing the irregular heartbeat, how often is he/she experiences such irregularity in his/her heartbeat (acute ectopic foci is usually non-life threatening, however, chronic type requires medical help), his/her lifestyle (he/she might be using illegal drugs, smokes and/or drinks alcohol,had too much coffee etc). Again, history taking is very vital.
This Allows organisms such as bacteria to rapidly adjust their transcription patterns in response to environmental conditions. in addition regulatory sites on prokaryotic DNA are typically located close to transcription promoter sites - and this plays an important part in gene expression
