What determines consumption and investment?

Consumption is primarily determined by factors such as income levels, consumer confidence, interest rates, and inflation, which influence individuals' willingness and ability to spend. Investment, on the other hand, is driven by factors including business expectations, interest rates, access to capital, and economic conditions. Both consumption and investment are also affected by government policies, such as taxation and fiscal stimulus, which can incentivize or discourage spending and investment activities. Ultimately, the interplay between these factors shapes overall economic activity.