Final answer:
In the context of diffusion and spread of innovation, Cultural homogeneity and Language barriers are obstacles, while Infrastructure development and Government support generally facilitate diffusion.
Step-by-step explanation:
The obstacles to diffusion and the spread of innovation can take various forms. Among the options provided:
Cultural homogeneity might resist change and the adoption of new ideas.
Infrastructure development is generally a facilitator for diffusion, not an obstacle, as it enables better communication and transportation.
Language barriers can impede the exchange of ideas and make it difficult for innovations to spread across linguistic divides.
Government support tends to facilitate the spread of innovation, especially when policies help protect intellectual property rights and provide assistance with research and development costs.
From the above options, Cultural homogeneity and Language barriers are obstacles to the diffusion and spread of innovation, while Infrastructure development and Government support are usually factors that promote it.